2022
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|
Mazurkiewicz, Bartosz; Giannopoulos, Ioannis
Replication of Wayfinding Studies in Different Geographic Areas. A Simulation Study Inproceedings
In: Krisp, Jukka; Meng, Liqiu; Kumke, Holger; Huang, Haosheng (Ed.): 17th International Conference on Location Based Services (LBS 2022), pp. 68–77, 2022.
@inproceedings{mazurkiewicz_giannopoulos:LBS.2022,
title = {Replication of Wayfinding Studies in Different Geographic Areas. A Simulation Study},
author = {Bartosz Mazurkiewicz and Ioannis Giannopoulos},
editor = {Jukka Krisp and Liqiu Meng and Holger Kumke and Haosheng Huang},
url = {https://geoinfo.geo.tuwien.ac.at/wp-content/uploads/2022/09/LBS_2022_mazurkiewicz_giannopoulos_docx.pdf
https://conferences.lfk.lrg.tum.de/lbs2022/proceedings.html},
year = {2022},
date = {2022-09-12},
urldate = {2022-09-12},
booktitle = {17th International Conference on Location Based Services (LBS 2022)},
pages = {68--77},
abstract = {Replication of real-world wayfinding studies is not a trivial task. Even less if it is to be replicated in a different geographic environment. The selection of one or several routes is one of many decisions to be made. Only recently (2021), a reproducible, systematic and score-based approach for route selection for wayfinding experiments was published. Besides allowing for selecting a route within a selected experimental area, it claims to be able to find similar routes in different geographic areas. However, it remains unclear if similar, according to this route selection framework, routes lead to similar study results. In order to answer this question, an agent-based simulation comparing Turn-byTurn and Free Choice Navigation approaches (between-subject design) is run in one European (Vienna) and one African (Djibouti City) city. First, a route in Vienna is selected and, second, the 5 most and the 5 least similar routes in Djibouti City are found. These routes are used in the simulation in order to scrutinize if more similar routes lead to more similar results regarding the arrival rate as a metric. The results suggest that the route selection framework is suitable for replication studies for the Turn-By-Turn navigation approach but needs further improvement for the Free Choice Navigation approach by adding features describing the neighborhood of the route.},
keywords = {Agent-based Simulation, experimental design, Replicability},
pubstate = {published},
tppubtype = {inproceedings}
}
Replication of real-world wayfinding studies is not a trivial task. Even less if it is to be replicated in a different geographic environment. The selection of one or several routes is one of many decisions to be made. Only recently (2021), a reproducible, systematic and score-based approach for route selection for wayfinding experiments was published. Besides allowing for selecting a route within a selected experimental area, it claims to be able to find similar routes in different geographic areas. However, it remains unclear if similar, according to this route selection framework, routes lead to similar study results. In order to answer this question, an agent-based simulation comparing Turn-byTurn and Free Choice Navigation approaches (between-subject design) is run in one European (Vienna) and one African (Djibouti City) city. First, a route in Vienna is selected and, second, the 5 most and the 5 least similar routes in Djibouti City are found. These routes are used in the simulation in order to scrutinize if more similar routes lead to more similar results regarding the arrival rate as a metric. The results suggest that the route selection framework is suitable for replication studies for the Turn-By-Turn navigation approach but needs further improvement for the Free Choice Navigation approach by adding features describing the neighborhood of the route.
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Alinaghi, Negar; Kattenbeck, Markus; Giannopoulos, Ioannis
I Can Tell by Your Eyes! Continuous Gaze-Based Turn-Activity Prediction Reveals Spatial Familiarity Inproceedings
In: pp. 2:1–2:13, Schloss Dagstuhl — Leibniz-Zentrum f{"u}r Informatik, 2022, ISBN: 978-3-95977-257-0.
@inproceedings{alinaghi2022can,
title = {I Can Tell by Your Eyes! Continuous Gaze-Based Turn-Activity Prediction Reveals Spatial Familiarity},
author = {Alinaghi, Negar and Kattenbeck, Markus and Giannopoulos, Ioannis},
url = {https://drops.dagstuhl.de/opus/volltexte/2022/16887/},
doi = {10.4230/LIPIcs.COSIT.2022.2},
isbn = {978-3-95977-257-0},
year = {2022},
date = {2022-08-22},
urldate = {2022-08-22},
pages = {2:1--2:13},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{"u}r Informatik},
abstract = {Spatial familiarity plays an essential role in the wayfinding decision-making process. Recent findings in wayfinding activity recognition domain suggest that wayfinders' turning behavior at junctions is strongly influenced by their spatial familiarity. By continuously monitoring wayfinders' turning behavior as reflected in their eye movements during the decision-making period (i.e., immediately after an instruction is received until reaching the corresponding junction for which the instruction was given), we provide evidence that familiar and unfamiliar wayfinders can be distinguished. By applying a pre-trained XGBoost turning activity classifier on gaze data collected in a real-world wayfinding task with 33 participants, our results suggest that familiar and unfamiliar wayfinders show different onset and intensity of turning behavior. These variations are not only present between the two classes -familiar vs. unfamiliar- but also within each class. The differences in turning-behavior within each class may stem from multiple sources, including different levels of familiarity with the environment.},
keywords = {eye tracking, human activity recognition, Machine Learning, Spatial Familiarity},
pubstate = {published},
tppubtype = {inproceedings}
}
Spatial familiarity plays an essential role in the wayfinding decision-making process. Recent findings in wayfinding activity recognition domain suggest that wayfinders’ turning behavior at junctions is strongly influenced by their spatial familiarity. By continuously monitoring wayfinders’ turning behavior as reflected in their eye movements during the decision-making period (i.e., immediately after an instruction is received until reaching the corresponding junction for which the instruction was given), we provide evidence that familiar and unfamiliar wayfinders can be distinguished. By applying a pre-trained XGBoost turning activity classifier on gaze data collected in a real-world wayfinding task with 33 participants, our results suggest that familiar and unfamiliar wayfinders show different onset and intensity of turning behavior. These variations are not only present between the two classes -familiar vs. unfamiliar- but also within each class. The differences in turning-behavior within each class may stem from multiple sources, including different levels of familiarity with the environment.
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Alinaghi, Negar; Giannopoulos, Ioannis
Consider the Head Movements! Saccade Computation in Mobile Eye-Tracking Inproceedings
In: 2022 Symposium on Eye Tracking Research and Applications, Association for Computing Machinery, Seattle, WA, USA, 2022, ISBN: 9781450392525.
@inproceedings{10.1145/3517031.3529624,
title = {Consider the Head Movements! Saccade Computation in Mobile Eye-Tracking},
author = {Alinaghi, Negar and Giannopoulos, Ioannis},
url = {https://doi.org/10.1145/3517031.3529624},
doi = {10.1145/3517031.3529624},
isbn = {9781450392525},
year = {2022},
date = {2022-01-01},
urldate = {2022-01-01},
booktitle = {2022 Symposium on Eye Tracking Research and Applications},
publisher = {Association for Computing Machinery},
address = {Seattle, WA, USA},
series = {ETRA '22},
abstract = {Saccadic eye movements are known to serve as a suitable proxy for tasks prediction. In mobile eye-tracking, saccadic events are strongly influenced by head movements. Common attempts to compensate for head-movement effects either neglect saccadic events altogether or fuse gaze and head-movement signals measured by IMUs in order to simulate the gaze signal at head-level. Using image processing techniques, we propose a solution for computing saccades based on frames of the scene-camera video. In this method, fixations are first detected based on gaze positions specified in the coordinate system of each frame, and then respective frames are merged. Lastly, pairs of consecutive fixations –forming a saccade- are projected into the coordinate system of the stitched image using the homography matrices computed by the stitching algorithm. The results show a significant difference in length between projected and original saccades, and approximately 37% of error introduced by employing saccades without head-movement consideration.},
keywords = {AI, eye tracking, Saccades},
pubstate = {published},
tppubtype = {inproceedings}
}
Saccadic eye movements are known to serve as a suitable proxy for tasks prediction. In mobile eye-tracking, saccadic events are strongly influenced by head movements. Common attempts to compensate for head-movement effects either neglect saccadic events altogether or fuse gaze and head-movement signals measured by IMUs in order to simulate the gaze signal at head-level. Using image processing techniques, we propose a solution for computing saccades based on frames of the scene-camera video. In this method, fixations are first detected based on gaze positions specified in the coordinate system of each frame, and then respective frames are merged. Lastly, pairs of consecutive fixations –forming a saccade- are projected into the coordinate system of the stitched image using the homography matrices computed by the stitching algorithm. The results show a significant difference in length between projected and original saccades, and approximately 37% of error introduced by employing saccades without head-movement consideration.
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Cutchan, Marvin Mc; Giannopoulos, Ioannis
Encoding Geospatial Vector Data for Deep Learning: LULC as a Use Case Journal Article
In: Remote Sensing, vol. 14, no. 12, 2022, ISSN: 2072-4292.
@article{rs14122812,
title = {Encoding Geospatial Vector Data for Deep Learning: LULC as a Use Case},
author = {Marvin Mc Cutchan and Ioannis Giannopoulos},
url = {https://www.mdpi.com/2072-4292/14/12/2812},
doi = {10.3390/rs14122812},
issn = {2072-4292},
year = {2022},
date = {2022-01-01},
urldate = {2022-01-01},
journal = {Remote Sensing},
volume = {14},
number = {12},
abstract = {Geospatial vector data with semantic annotations are a promising but complex data source for spatial prediction tasks such as land use and land cover (LULC) classification. These data describe the geometries and the types (i.e., semantics) of geo-objects, such as a Shop or an Amenity. Unlike raster data, which are commonly used for such prediction tasks, geospatial vector data are irregular and heterogenous, making it challenging for deep neural networks to learn based on them. This work tackles this problem by introducing novel encodings which quantify the geospatial vector data allowing deep neural networks to learn based on them, and to spatially predict. These encodings were evaluated in this work based on a specific use case, namely LULC classification. We therefore classified LULC based on the different encodings as input and an attention-based deep neural network (called Perceiver). Based on the accuracy assessments, the potential of these encodings is compared. Furthermore, the influence of the object semantics on the classification performance is analyzed. This is performed by pruning the ontology, describing the semantics and repeating the LULC classification. The results of this work suggest that the encoding of the geography and the semantic granularity of geospatial vector data influences the classification performance overall and on a LULC class level. Nevertheless, the proposed encodings are not restricted to LULC classification but can be applied to other spatial prediction tasks too. In general, this work highlights that geospatial vector data with semantic annotations is a rich data source unlocking new potential for spatial predictions. However, we also show that this potential depends on how much is known about the semantics, and how the geography is presented to the deep neural network.},
keywords = {AI, Deep learning, geoinformation, geosemantics, LULC, Volunteered Geographic Information},
pubstate = {published},
tppubtype = {article}
}
Geospatial vector data with semantic annotations are a promising but complex data source for spatial prediction tasks such as land use and land cover (LULC) classification. These data describe the geometries and the types (i.e., semantics) of geo-objects, such as a Shop or an Amenity. Unlike raster data, which are commonly used for such prediction tasks, geospatial vector data are irregular and heterogenous, making it challenging for deep neural networks to learn based on them. This work tackles this problem by introducing novel encodings which quantify the geospatial vector data allowing deep neural networks to learn based on them, and to spatially predict. These encodings were evaluated in this work based on a specific use case, namely LULC classification. We therefore classified LULC based on the different encodings as input and an attention-based deep neural network (called Perceiver). Based on the accuracy assessments, the potential of these encodings is compared. Furthermore, the influence of the object semantics on the classification performance is analyzed. This is performed by pruning the ontology, describing the semantics and repeating the LULC classification. The results of this work suggest that the encoding of the geography and the semantic granularity of geospatial vector data influences the classification performance overall and on a LULC class level. Nevertheless, the proposed encodings are not restricted to LULC classification but can be applied to other spatial prediction tasks too. In general, this work highlights that geospatial vector data with semantic annotations is a rich data source unlocking new potential for spatial predictions. However, we also show that this potential depends on how much is known about the semantics, and how the geography is presented to the deep neural network.
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Mazurkiewicz, Bartosz; Kattenbeck, Markus; Giannopoulos, Ioannis
Rethinking Route Choices! On the Importance of Route Selection in Wayfinding Experiments Inproceedings
In: Ishikawa, Toru; Fabrikant, Sara Irina; Winter, Stephan (Ed.): 15th International Conference on Spatial Information Theory (COSIT 2022), pp. 6:1–6:13, Schloss Dagstuhl — Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2022, ISSN: 1868-8969.
@inproceedings{mazurkiewicz_et_al:LIPIcs.COSIT.2022.6,
title = {Rethinking Route Choices! On the Importance of Route Selection in Wayfinding Experiments},
author = {Bartosz Mazurkiewicz and Markus Kattenbeck and Ioannis Giannopoulos},
editor = {Toru Ishikawa and Sara Irina Fabrikant and Stephan Winter},
url = {https://drops.dagstuhl.de/opus/volltexte/2022/16891},
doi = {10.4230/LIPIcs.COSIT.2022.6},
issn = {1868-8969},
year = {2022},
date = {2022-01-01},
urldate = {2022-01-01},
booktitle = {15th International Conference on Spatial Information Theory (COSIT 2022)},
volume = {240},
pages = {6:1--6:13},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum für Informatik},
address = {Dagstuhl, Germany},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
abstract = {Route selection for a wayfinding experiment is not a trivial task and is often made in an undocumented way. Only recently (2021), a systematic, reproducible and score-based approach for route selection for wayfinding experiments was published. However, it is still unclear how robust study results are across all potential routes in a particular experimental area. An important share of routes might lead to different conclusions than most routes. This share would distort and/or invert the study outcome. If so, the question of selecting routes that are unlikely to distort the results of our wayfinding experiments remains unanswered. In order to answer these questions, an agent-based simulation study with four different sample sizes (N = 15, 25, 50, 3000 agents) comparing Turn-by-Turn and Free Choice Navigation approaches (between-subject design) regarding their arrival rates on more than 11000 routes in the city center of Vienna, Austria, was run. The results of our study indicate that with decreasing sample size, there is an increase in the share of routes which lead to contradictory results regarding the arrival rate, i.e., the results become less robust. Therefore, based on simulation results, we present an approach for selecting suitable routes even for small-scale in-situ studies.},
keywords = {Agent-based Simulation, experimental design, Route selection, Wayfinding},
pubstate = {published},
tppubtype = {inproceedings}
}
Route selection for a wayfinding experiment is not a trivial task and is often made in an undocumented way. Only recently (2021), a systematic, reproducible and score-based approach for route selection for wayfinding experiments was published. However, it is still unclear how robust study results are across all potential routes in a particular experimental area. An important share of routes might lead to different conclusions than most routes. This share would distort and/or invert the study outcome. If so, the question of selecting routes that are unlikely to distort the results of our wayfinding experiments remains unanswered. In order to answer these questions, an agent-based simulation study with four different sample sizes (N = 15, 25, 50, 3000 agents) comparing Turn-by-Turn and Free Choice Navigation approaches (between-subject design) regarding their arrival rates on more than 11000 routes in the city center of Vienna, Austria, was run. The results of our study indicate that with decreasing sample size, there is an increase in the share of routes which lead to contradictory results regarding the arrival rate, i.e., the results become less robust. Therefore, based on simulation results, we present an approach for selecting suitable routes even for small-scale in-situ studies.
|
|
Weber, Valentin; Navratil, Gerhard; Blauensteiner, Franz
Managing Inhomogeneity in the Control Point Network during Staking Out Cadastral Boundaries in Austria Journal Article
In: ISPRS International Journal of Geo-Information, vol. 11, no. 5, 2022.
@article{weber22[TUW-303893],
title = {Managing Inhomogeneity in the Control Point Network during Staking Out Cadastral Boundaries in Austria},
author = {Valentin Weber and Gerhard Navratil and Franz Blauensteiner},
url = {https://publik.tuwien.ac.at/files/publik_303893.pdf},
doi = {10.3390/ijgi11050274},
year = {2022},
date = {2022-01-01},
journal = {ISPRS International Journal of Geo-Information},
volume = {11},
number = {5},
keywords = {Cadastre, control points, coordinate adjustment, inhomogeneity, integration of geospatial data, procedure, staking out},
pubstate = {published},
tppubtype = {article}
}
|
|
Navratil, Gerhard; Ramler, Georg
Using Metadata Standards in a Public Authority Unpublished
2022, (Vortrag: ISO-Workshop Standard in Action, Wien; 2022-05-11).
@unpublished{navratil22[TUW-304108],
title = {Using Metadata Standards in a Public Authority},
author = {Gerhard Navratil and Georg Ramler},
year = {2022},
date = {2022-01-01},
note = {Vortrag: ISO-Workshop Standard in Action, Wien; 2022-05-11},
keywords = {{E}rstellen, {I}{S}{O}, {M}etadaten, {S}tandard},
pubstate = {published},
tppubtype = {unpublished}
}
|
|
Murekatete, Rachel
Sensitivity, Variation, and Application of Least-Cost Path Models in Landscape Connectivity Analysis and Corridor Planning PhD Thesis
KTH, Geoinformatics, 2022.
@phdthesis{murekatete22[TUW-304315],
title = {Sensitivity, Variation, and Application of Least-Cost Path Models in Landscape Connectivity Analysis and Corridor Planning},
author = {Rachel Murekatete},
year = {2022},
date = {2022-01-01},
school = {KTH, Geoinformatics},
keywords = {{C}onservation corridor, {C}ost surface, {E}ffective distance, {G}eographic {I}nformation {S}ystems, {L}and evaluation, {L}andscape connectivity, {L}east-cost path, {O}rdinal scale, {R}aster data, {S}patial resolution, {S}tepping stones, {S}uitability analysis, {S}uitability surface},
pubstate = {published},
tppubtype = {phdthesis}
}
|
2021
|
|
Mazurkiewicz, Bartosz; Kattenbeck, Markus; Giannopoulos, Ioannis
Navigating Your Way! Increasing the Freedom of Choice During Wayfinding Inproceedings
In: Janowicz, Krzysztof; Verstegen, Judith A. (Ed.): 11th International Conference on Geographic Information Science (GIScience 2021) – Part II, pp. 9:1–9:16, Schloss Dagstuhl — Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2021, ISSN: 1868-8969.
@inproceedings{mazurkiewicz_et_al:LIPIcs.GIScience.2021.II.9,
title = {Navigating Your Way! Increasing the Freedom of Choice During Wayfinding},
author = {Bartosz Mazurkiewicz and Markus Kattenbeck and Ioannis Giannopoulos},
editor = {Krzysztof Janowicz and Judith A. Verstegen},
url = {https://drops.dagstuhl.de/opus/volltexte/2021/14768},
doi = {10.4230/LIPIcs.GIScience.2021.II.9},
issn = {1868-8969},
year = {2021},
date = {2021-09-14},
urldate = {2021-09-14},
booktitle = {11th International Conference on Geographic Information Science (GIScience 2021) - Part II},
volume = {208},
pages = {9:1--9:16},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum für Informatik},
address = {Dagstuhl, Germany},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
abstract = {Using navigation assistance systems has become widespread and scholars have tried to mitigate potentially adverse effects on spatial cognition these systems may have due to the division of attention they require. In order to nudge the user to engage more with the environment, we propose a novel navigation paradigm called Free Choice Navigation balancing the number of free choices, route length and number of instructions given. We test the viability of this approach by means of an agent-based simulation for three different cities. Environmental spatial abilities and spatial confidence are the two most important modeled features of our agents. Our results are very promising: Agents could decide freely at more than 50% of all junctions. More than 90% of the agents reached their destination within an average distance of about 125% shortest path length.},
keywords = {Agent-based Simulation, Free Choice Navigation, Wayfinding},
pubstate = {published},
tppubtype = {inproceedings}
}
Using navigation assistance systems has become widespread and scholars have tried to mitigate potentially adverse effects on spatial cognition these systems may have due to the division of attention they require. In order to nudge the user to engage more with the environment, we propose a novel navigation paradigm called Free Choice Navigation balancing the number of free choices, route length and number of instructions given. We test the viability of this approach by means of an agent-based simulation for three different cities. Environmental spatial abilities and spatial confidence are the two most important modeled features of our agents. Our results are very promising: Agents could decide freely at more than 50% of all junctions. More than 90% of the agents reached their destination within an average distance of about 125% shortest path length.
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|
Mazurkiewicz, Bartosz; Giannopoulos, Ioannis
Route Selection – From Replication to Recreation Workshop
2021, (Cycling@CHI: Towards a Research Agenda for HCI in the Bike Lane at CHI ’21, May 8–13, 2021, Yokohama, Japan. ACM, New York, NY, USA, 5 pages).
@workshop{Mazurkiewicz2021,
title = {Route Selection - From Replication to Recreation},
author = {Bartosz Mazurkiewicz and Ioannis Giannopoulos},
editor = {Cycling@CHI: Towards a Research Agenda for HCI in the Bike Lane at CHI ’21, May 8–13, 2021, Yokohama, Japan. ACM, New York, NY, USA, 5 pages},
url = {https://geoinfo.geo.tuwien.ac.at/wp-content/uploads/2021/11/chi_workshop_route_selection_mazurkiewicz.pdf},
year = {2021},
date = {2021-05-07},
urldate = {2021-05-07},
abstract = {The choice of a route from an origin to a destination depends on several criteria. These criteria can range from route length to
environment type. In several situations, we are not only interested in finding a route between two points, but to find a route between all possible origin-destination points in a specific geographic area. This is very common during experimental design, when one is seeking for a generalizable route to evaluate a navigation system. For this case, the selected route should be representative for the area, and not an exception with peculiarities. In this work we demonstrate (1) how to choose an average route for a bike navigation study in Vienna, Austria and (2) how to find similar routes in Florence, Italy and Bremen, Germany in order to replicate the study. The selection is based on route features and associated weights. They can be highly customized according to the needs. We demonstrate our approach and introduce four application scenarios to exemplify the benefits of a systematic route selection.},
note = {Cycling@CHI: Towards a Research Agenda for HCI in the Bike Lane at CHI ’21, May 8–13, 2021, Yokohama, Japan. ACM, New York, NY, USA, 5 pages},
keywords = {Experiments, Navigation, Replicability, Route selection, Wayfinding},
pubstate = {published},
tppubtype = {workshop}
}
The choice of a route from an origin to a destination depends on several criteria. These criteria can range from route length to
environment type. In several situations, we are not only interested in finding a route between two points, but to find a route between all possible origin-destination points in a specific geographic area. This is very common during experimental design, when one is seeking for a generalizable route to evaluate a navigation system. For this case, the selected route should be representative for the area, and not an exception with peculiarities. In this work we demonstrate (1) how to choose an average route for a bike navigation study in Vienna, Austria and (2) how to find similar routes in Florence, Italy and Bremen, Germany in order to replicate the study. The selection is based on route features and associated weights. They can be highly customized according to the needs. We demonstrate our approach and introduce four application scenarios to exemplify the benefits of a systematic route selection.
|
|
Cutchan, Marvin Mc; Comber, Alexis J.; Giannopoulos, Ioannis; Canestrini, Manuela
Semantic Boosting: Enhancing Deep Learning Based LULC Classification Journal Article
In: Remote Sensing, vol. 13, no. 16, 2021, ISSN: 2072-4292.
@article{rs13163197,
title = {Semantic Boosting: Enhancing Deep Learning Based LULC Classification},
author = {Marvin Mc Cutchan and Alexis J. Comber and Ioannis Giannopoulos and Manuela Canestrini},
url = {https://www.mdpi.com/2072-4292/13/16/3197},
doi = {10.3390/rs13163197},
issn = {2072-4292},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {Remote Sensing},
volume = {13},
number = {16},
abstract = {The classification of land use and land cover (LULC) is a well-studied task within the domain of remote sensing and geographic information science. It traditionally relies on remotely sensed imagery and therefore models land cover classes with respect to their electromagnetic reflectances, aggregated in pixels. This paper introduces a methodology which enables the inclusion of geographical object semantics (from vector data) into the LULC classification procedure. As such, information on the types of geographic objects (e.g., Shop, Church, Peak, etc.) can improve LULC classification accuracy. In this paper, we demonstrate how semantics can be fused with imagery to classify LULC. Three experiments were performed to explore and highlight the impact and potential of semantics for this task. In each experiment CORINE LULC data was used as a ground truth and predicted using imagery from Sentinel-2 and semantics from LinkedGeoData using deep learning. Our results reveal that LULC can be classified from semantics only and that fusing semantics with imagery—Semantic Boosting—improved the classification with significantly higher LULC accuracies. The results show that some LULC classes are better predicted using only semantics, others with just imagery, and importantly much of the improvement was due to the ability to separate similar land use classes. A number of key considerations are discussed.},
keywords = {Deep learning, geo-encoding, geosemantics},
pubstate = {published},
tppubtype = {article}
}
The classification of land use and land cover (LULC) is a well-studied task within the domain of remote sensing and geographic information science. It traditionally relies on remotely sensed imagery and therefore models land cover classes with respect to their electromagnetic reflectances, aggregated in pixels. This paper introduces a methodology which enables the inclusion of geographical object semantics (from vector data) into the LULC classification procedure. As such, information on the types of geographic objects (e.g., Shop, Church, Peak, etc.) can improve LULC classification accuracy. In this paper, we demonstrate how semantics can be fused with imagery to classify LULC. Three experiments were performed to explore and highlight the impact and potential of semantics for this task. In each experiment CORINE LULC data was used as a ground truth and predicted using imagery from Sentinel-2 and semantics from LinkedGeoData using deep learning. Our results reveal that LULC can be classified from semantics only and that fusing semantics with imagery—Semantic Boosting—improved the classification with significantly higher LULC accuracies. The results show that some LULC classes are better predicted using only semantics, others with just imagery, and importantly much of the improvement was due to the ability to separate similar land use classes. A number of key considerations are discussed.
|
|
Stähli, Lisa; Giannopoulos, Ioannis; Raubal, Martin
Evaluation of pedestrian navigation in Smart Cities Journal Article
In: Environment and Planning B: Urban Analytics and City Science, vol. 48, no. 6, pp. 1728–1745, 2021.
@article{stahli2021evaluation,
title = {Evaluation of pedestrian navigation in Smart Cities},
author = {Lisa Stähli and Ioannis Giannopoulos and Martin Raubal},
url = {https://doi.org/10.1177/2399808320949538},
doi = {10.1177/2399808320949538},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {Environment and Planning B: Urban Analytics and City Science},
volume = {48},
number = {6},
pages = {1728--1745},
publisher = {SAGE Publications Sage UK: London, England},
abstract = {This work addresses recent research in the area of pedestrian navigation aids that aims at finding alternatives to the widely used map-based turn-by-turn navigation systems in the context of Smart City environments. Four different approaches of pedestrian navigation systems were compared to each other in a user experiment that was conducted in a virtual environment: (1) map-based, (2) landmark-based, (3) augmented reality, and (4) public display navigation. The results of the experiment with 45 participants conducted in a virtual environment suggest that the augmented reality navigation performs best concerning efficiency and effectiveness and the landmark-based navigation performs worst in the context of Smart Cities.},
keywords = {augmented reality, Navigation, virtual environment},
pubstate = {published},
tppubtype = {article}
}
This work addresses recent research in the area of pedestrian navigation aids that aims at finding alternatives to the widely used map-based turn-by-turn navigation systems in the context of Smart City environments. Four different approaches of pedestrian navigation systems were compared to each other in a user experiment that was conducted in a virtual environment: (1) map-based, (2) landmark-based, (3) augmented reality, and (4) public display navigation. The results of the experiment with 45 participants conducted in a virtual environment suggest that the augmented reality navigation performs best concerning efficiency and effectiveness and the landmark-based navigation performs worst in the context of Smart Cities.
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Golab, Antonia; Kattenbeck, Markus; Sarlas, Georgios; Giannopoulos, Ioannis
It’s also about timing! When do pedestrians want to receive navigation instructions Journal Article
In: Spatial Cognition & Computation, vol. 0, no. 0, pp. 1-33, 2021.
@article{geoinfo21timing,
title = {It's also about timing! When do pedestrians want to receive navigation instructions},
author = {Antonia Golab and Markus Kattenbeck and Georgios Sarlas and Ioannis Giannopoulos},
url = {https://doi.org/10.1080/13875868.2021.1942474},
doi = {10.1080/13875868.2021.1942474},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {Spatial Cognition & Computation},
volume = {0},
number = {0},
pages = {1-33},
publisher = {Taylor & Francis},
abstract = {Despite the increased research interest in wayfinding assistance systems, research on the appropriate point in time or space to automatically present a route instruction remains a desideratum. We address this research gap by reporting on the results of an outdoor, within-subject design wayfinding study (N=52). Participants walked two different routes for which they requested spoken, landmark-based turn-by-turn route instructions. By means of a survival analysis, we model the points in space at which participants issue such requests, considering personal, environmental, route- and trial-related variables. We reveal different landcover classes (e.g., densely built-up areas) and personal variables (e.g., egocentric orientation and age) to be important, discuss potential reasons for their impact and derive open research questions. },
keywords = {instructions, modeling, Navigation, timing},
pubstate = {published},
tppubtype = {article}
}
Despite the increased research interest in wayfinding assistance systems, research on the appropriate point in time or space to automatically present a route instruction remains a desideratum. We address this research gap by reporting on the results of an outdoor, within-subject design wayfinding study (N=52). Participants walked two different routes for which they requested spoken, landmark-based turn-by-turn route instructions. By means of a survival analysis, we model the points in space at which participants issue such requests, considering personal, environmental, route- and trial-related variables. We reveal different landcover classes (e.g., densely built-up areas) and personal variables (e.g., egocentric orientation and age) to be important, discuss potential reasons for their impact and derive open research questions.
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Alinaghi, Negar; Kattenbeck, Markus; Golab, Antonia; Giannopoulos, Ioannis
Will You Take This Turn? Gaze-Based Turning Activity Recognition During Navigation Inproceedings
In: Janowicz, Krzysztof; Verstegen, Judith A. (Ed.): 11th International Conference on Geographic Information Science (GIScience 2021) – Part II, pp. 5:1–5:16, Schloss Dagstuhl — Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2021, ISSN: 1868-8969.
@inproceedings{alinaghi_et_al:LIPIcs.GIScience.2021.II.5,
title = {Will You Take This Turn? Gaze-Based Turning Activity Recognition During Navigation},
author = {Alinaghi, Negar and Kattenbeck, Markus and Antonia Golab and Giannopoulos, Ioannis},
editor = {Krzysztof Janowicz and Judith A. Verstegen},
url = {https://drops.dagstuhl.de/opus/volltexte/2021/14764},
doi = {10.4230/LIPIcs.GIScience.2021.II.5},
issn = {1868-8969},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
booktitle = {11th International Conference on Geographic Information Science (GIScience 2021) - Part II},
volume = {208},
pages = {5:1--5:16},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum für Informatik},
address = {Dagstuhl, Germany},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
abstract = {Decision making is an integral part of wayfinding and people progressively use navigation systems to facilitate this task. The primary decision, which is also the main source of navigation error, is about the turning activity, i.e., to decide either to turn left or right or continue straight forward. The fundamental step to deal with this error, before applying any preventive approaches, e.g., providing more information, or any compensatory solutions, e.g., pre-calculating alternative routes, could be to predict and recognize the potential turning activity. This paper aims to address this step by predicting the turning decision of pedestrian wayfinders, before the actual action takes place, using primarily gaze-based features. Applying Machine Learning methods, the results of the presented experiment demonstrate an overall accuracy of 91% within three seconds before arriving at a decision point. Beyond the application perspective, our findings also shed light on the cognitive processes of decision making as reflected by the wayfinder’s gaze behaviour: incorporating environmental and user-related factors to the model, results in a noticeable change with respect to the importance of visual search features in turn activity recognition.},
keywords = {eye tracking, human activity recognition, Machine Learning, Wayfinding},
pubstate = {published},
tppubtype = {inproceedings}
}
Decision making is an integral part of wayfinding and people progressively use navigation systems to facilitate this task. The primary decision, which is also the main source of navigation error, is about the turning activity, i.e., to decide either to turn left or right or continue straight forward. The fundamental step to deal with this error, before applying any preventive approaches, e.g., providing more information, or any compensatory solutions, e.g., pre-calculating alternative routes, could be to predict and recognize the potential turning activity. This paper aims to address this step by predicting the turning decision of pedestrian wayfinders, before the actual action takes place, using primarily gaze-based features. Applying Machine Learning methods, the results of the presented experiment demonstrate an overall accuracy of 91% within three seconds before arriving at a decision point. Beyond the application perspective, our findings also shed light on the cognitive processes of decision making as reflected by the wayfinder’s gaze behaviour: incorporating environmental and user-related factors to the model, results in a noticeable change with respect to the importance of visual search features in turn activity recognition.
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Mansberger, Reinfried; Navratil, Gerhard; Unger, Eva-Maria; Bauer, Thomas
Unterrichten an einer äthiopischen Universität: Ein Erfahrungsbericht Journal Article
In: Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), vol. 109. Jahrgang, no. 1, pp. 3–18, 2021.
@article{TUW-296143,
title = {Unterrichten an einer äthiopischen Universität: Ein Erfahrungsbericht},
author = {Reinfried Mansberger and Gerhard Navratil and Eva-Maria Unger and Thomas Bauer},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {Österreichische Zeitschrift für Vermessung und Geoinformation (VGI)},
volume = {109. Jahrgang},
number = {1},
pages = {3--18},
abstract = {Within the framework of the APPEAR program funded by the Austrian Development Agency, two Austrian and two Ethiopian universities cooperated in the EduLAND-2 project. Ŧhe aim of this project was to build capacities in Ethiopia in the field of surveying and especially in land administration. A bachelor study program "Land Administration and Surveying" was established at the Đebre Markos University (DMU), including the necessary personnel and instrumental infrastructure. Austrian lecturers also taught some courses at the DMU. Ŧhis article documents the goals and successes of the EduLAND-2 project and describes the experiences made by the teachers. The impressions gained by Austrian teachers should serve as motivation for colleagues to participate in such projects.},
keywords = {Appear-Program, Curriculum development, Development aid, Ethipia},
pubstate = {published},
tppubtype = {article}
}
Within the framework of the APPEAR program funded by the Austrian Development Agency, two Austrian and two Ethiopian universities cooperated in the EduLAND-2 project. Ŧhe aim of this project was to build capacities in Ethiopia in the field of surveying and especially in land administration. A bachelor study program "Land Administration and Surveying" was established at the Đebre Markos University (DMU), including the necessary personnel and instrumental infrastructure. Austrian lecturers also taught some courses at the DMU. Ŧhis article documents the goals and successes of the EduLAND-2 project and describes the experiences made by the teachers. The impressions gained by Austrian teachers should serve as motivation for colleagues to participate in such projects.
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Schmidl, Martin; Navratil, Gerhard; Giannopoulos, Ioannis
An Approach to Assess the Effect of Currentness of Spatial Data on Routing Quality Inproceedings
In: Partsinevelos, Panagiotis; Kyriakidis, Phaedon; Kavouras, Marinos (Ed.): Proceedings of the 24th AGILE Conference on Geographic Information Science, Copernikus Publications, 2021, (talk: 24th AGILE Conference on Geographic Information Science, Chania, Greece, Online; 2021-06-08 — 2021-06-11).
@inproceedings{TUW-296258,
title = {An Approach to Assess the Effect of Currentness of Spatial Data on Routing Quality},
author = {Martin Schmidl and Gerhard Navratil and Ioannis Giannopoulos},
editor = {Panagiotis Partsinevelos and Phaedon Kyriakidis and Marinos Kavouras},
doi = {10.5194/agile-giss-2-13-2021},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
booktitle = {Proceedings of the 24th AGILE Conference on Geographic Information Science},
publisher = {Copernikus Publications},
abstract = {During spatial decision making, the quality of the utilized data is of high importance. During navigation these decisions are crucial for being routed to the desired destination (usually going by the shortest or fastest route). Road networks, the main data source for routing, are prone to changes which can have a big impact on the computed route and therefore on travel time. For instance, routes computed using an outdated street network can result in longer travel times, in longer distance, as well in cases where the desired destination might not be anymore reachable via the computed route. Data from OpenStreetMap with different timestamps allows us to download road network snapshots from different years, i.e., from 2014 to 2020. On each of those datasets the fastest route between 500 randomly chosen point pairs in Vienna, Austria, was computed. Ŧhese routes were also reconstructed on the most recent dataset for evaluation reasons. Ŧhe resulting travel times, travel length as well as feasibility of the route were compared with the most recent dataset. Ŧhe results provide a first assessment of temporal quality based on the currentness of a dataset.},
note = {talk: 24th AGILE Conference on Geographic Information Science, Chania, Greece, Online; 2021-06-08 -- 2021-06-11},
keywords = {Currency, Navigation, OSM, Spatial Data Quality, VGI},
pubstate = {published},
tppubtype = {inproceedings}
}
During spatial decision making, the quality of the utilized data is of high importance. During navigation these decisions are crucial for being routed to the desired destination (usually going by the shortest or fastest route). Road networks, the main data source for routing, are prone to changes which can have a big impact on the computed route and therefore on travel time. For instance, routes computed using an outdated street network can result in longer travel times, in longer distance, as well in cases where the desired destination might not be anymore reachable via the computed route. Data from OpenStreetMap with different timestamps allows us to download road network snapshots from different years, i.e., from 2014 to 2020. On each of those datasets the fastest route between 500 randomly chosen point pairs in Vienna, Austria, was computed. Ŧhese routes were also reconstructed on the most recent dataset for evaluation reasons. Ŧhe resulting travel times, travel length as well as feasibility of the route were compared with the most recent dataset. Ŧhe results provide a first assessment of temporal quality based on the currentness of a dataset.
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Karabin, Marcin; Kitsakis, Dimitrios; Koeva, Mila; Navratil, Gerhard; Paasch, Jesper; Paulsson, Jenny; Vucic, Nikola; Janecka, Karel; Lisec, Anka
3D Cadastre in the Case of Engineering Objects, such as Bridges and Road Viaducts Inproceedings
In: Kalogianni, Eftychia; Rahman, Alias Abdul; Oosterom, Peter (Ed.): 7th International FIG Workshop on 3D Cadastres, pp. 19–36, FIG (International Federation of Surveyors), Copenhagen, Denmark, 2021, ISBN: 978-87-92853-48-6, (talk: 7th International FIG Workshop on 3Đ Cadastres, New York, USA; 2021-10-11 — 2021-10-13).
@inproceedings{TUW-297799,
title = {3D Cadastre in the Case of Engineering Objects, such as Bridges and Road Viaducts},
author = {Marcin Karabin and Dimitrios Kitsakis and Mila Koeva and Gerhard Navratil and Jesper Paasch and Jenny Paulsson and Nikola Vucic and Karel Janecka and Anka Lisec},
editor = {Eftychia Kalogianni and Alias Abdul Rahman and Peter Oosterom},
url = {https://publik.tuwien.ac.at/files/publik_297799.pdf},
isbn = {978-87-92853-48-6},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
booktitle = {7th International FIG Workshop on 3D Cadastres},
pages = {19--36},
publisher = {FIG (International Federation of Surveyors)},
address = {Copenhagen, Denmark},
abstract = {At present, the implementation of cadastral registration of transport investments (such as railway lines on bridges and on viaducts, roads on viaducts, etc.) is performed in the so-called "layer" system. Tis means that many objects are constructed at different levels (layers) within the space of a given parcel. Several parties may be interested in developing certain fragments of the parcel space; each of them is interested in acquiring rights only to a specified part of the parcel (its specified layer), in which given investment is implemented by that party. The legal conditions binding in many countries do not allow for implementation of such type investments within the space of a someone else's cadastral parcels, based on the ownership right. Ŧhis is due to the fact, in accordance with the "superficies solo cedit" rule applicable in many EU countries, the ownership right extends above and below the parcel space and cadastral systems do not allow for vertical division of a real property. Ŧhe conventional 2D cadastre, which does not allow vertical division of the parcel space, forces an investor to buy a whole parcel or to get other rights which allows using a specified space of someone else's parcel, such as easement rights. Buying of an entire parcel in which space bridges and road viaducts investments will be performed and not being able to divide the land space vertically makes it practically impossible to sell the parcel under a viaduct because following the rule above the viaduct is part of the land parcel. Ŧherefore, the space is not optimally utilized. The easement right has some disadvantages, as it cannot be encumbered with a mortgage; therefore it is not the basis of crediting a given investment. The 3D cadastre allows delineating 3D parcels (from the space of existing 2D parcels) that cover specified fragments of the space and to relate ownership rights to those delineated fragments.
Within a 3D cadastre system, such objects can be registered as separate cadastral objects. Ŧhis allows for the implementation of a line investment in the above-ground space in a flexible way, i.e. it is possible to get financing of an investment based on the mortgage charge of a 3D property and market transactions of the remaining space after delineation of the 3D parcel, covering the bridge or viaduct. This paper focuses on approaches to registration of real property rights in the case of engineering objects, such as bridges and road viaducts, in different EU countries: Austria, Bulgaria, Czech Republic, Croatia, Greece, Poland, Slovenia and Sweden. The authors review the current solutions for the registration of engineering objects in the cadastre, including its effectiveness in ensuring appropriate property rights to construct and exploit such objects, and make a comparison between the countries.},
note = {talk: 7th International FIG Workshop on 3Đ Cadastres, New York, USA; 2021-10-11 -- 2021-10-13},
keywords = {3D cadastre, Bridges, Comparison, Registration},
pubstate = {published},
tppubtype = {inproceedings}
}
At present, the implementation of cadastral registration of transport investments (such as railway lines on bridges and on viaducts, roads on viaducts, etc.) is performed in the so-called "layer" system. Tis means that many objects are constructed at different levels (layers) within the space of a given parcel. Several parties may be interested in developing certain fragments of the parcel space; each of them is interested in acquiring rights only to a specified part of the parcel (its specified layer), in which given investment is implemented by that party. The legal conditions binding in many countries do not allow for implementation of such type investments within the space of a someone else’s cadastral parcels, based on the ownership right. Ŧhis is due to the fact, in accordance with the "superficies solo cedit" rule applicable in many EU countries, the ownership right extends above and below the parcel space and cadastral systems do not allow for vertical division of a real property. Ŧhe conventional 2D cadastre, which does not allow vertical division of the parcel space, forces an investor to buy a whole parcel or to get other rights which allows using a specified space of someone else’s parcel, such as easement rights. Buying of an entire parcel in which space bridges and road viaducts investments will be performed and not being able to divide the land space vertically makes it practically impossible to sell the parcel under a viaduct because following the rule above the viaduct is part of the land parcel. Ŧherefore, the space is not optimally utilized. The easement right has some disadvantages, as it cannot be encumbered with a mortgage; therefore it is not the basis of crediting a given investment. The 3D cadastre allows delineating 3D parcels (from the space of existing 2D parcels) that cover specified fragments of the space and to relate ownership rights to those delineated fragments.
Within a 3D cadastre system, such objects can be registered as separate cadastral objects. Ŧhis allows for the implementation of a line investment in the above-ground space in a flexible way, i.e. it is possible to get financing of an investment based on the mortgage charge of a 3D property and market transactions of the remaining space after delineation of the 3D parcel, covering the bridge or viaduct. This paper focuses on approaches to registration of real property rights in the case of engineering objects, such as bridges and road viaducts, in different EU countries: Austria, Bulgaria, Czech Republic, Croatia, Greece, Poland, Slovenia and Sweden. The authors review the current solutions for the registration of engineering objects in the cadastre, including its effectiveness in ensuring appropriate property rights to construct and exploit such objects, and make a comparison between the countries.
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Gedefaw, Abebaw Andarge
Land Cover Change Monitoring, Land Certification and Land Consolidation: Towards Sustainable Rural Land Administration in Ethiopia referring to Gozamin District PhD Thesis
Universität für Bodenkultur/Institut für Geomatik, 2021.
@phdthesis{TUW-295204,
title = {Land Cover Change Monitoring, Land Certification and Land Consolidation: Towards Sustainable Rural Land Administration in Ethiopia referring to Gozamin District},
author = {Abebaw Andarge Gedefaw},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
school = {Universität für Bodenkultur/Institut für Geomatik},
abstract = {Preliminary remarks: 1. Information on land cover changes as well as the driving forces behind such changes underpin a proper understanding of the dynamics of land cover. 2. Tenure security is an important factor for land investment and for agricultural productivity. 3. Land consolidation is a proper tool to solve inefficiencies in agricultural production.
This study aims to examine the magnitude and rate of land cover change and to identify its major determinants. It aims to highlight effects of land certification on tenure security, land investment, crop productivity, and land dispute. Finally, it aims to assess the determinants, which influence the willingness of farmers to participate in voluntary land consolidation processes. The investigations were outlined in the Ethiopian Gozamin District and they are based on survey data collected from 343 randomly selected farm households, structured interviews, focus group discussions with farmers and expert panels. The collected data were analyzed quantitatively by using descriptive statistics and logistic regression models and they were complemented by qualitative data.
Satellite images of Landsat 5 (1986), Landsat 7 (2003), and Sentinel-2 (2018) were used to assess the dynamics of land cover. Focus group discussions, interviews, and farmers' lived experiences through a household survey were applied to identify the factors for land cover changes based on the DPSIR (Driver-Pressure-State-Impact-Response) Framework. Results of the investigations revealed that during the last three decades the study area has undergone an extensive land cover change, primarily a shift from cropland and grassland into forests and built-up areas. Thus, quantitative land cover change detection between 1986 and 2018 revealed that cropland, grassland, and bare areas declined by 10.53%, 5.7%, and 2.49%. Forest, built-up, shrub/scattered vegetation, and water bodies expanded by 13.47%, 4.02%, 0.98%, and 0.25%. Population growth, the rural land tenure system, the overuse of land, the climate change, and the scarcity of grazing land could be identified as key drivers of these land cover changes.
The assessment of land tenure security indicated that most farm households feel that their land use rights are secure after the certification process. Only 17% fear that the government at any time could take their land use rights. Most farm households identified a reduction of disputes after certification and land management practices improved from 70.3% before certification to 90.1% after certification. As key factors for the increase of terracing and the application of manure, the study determined total farm size, the average distance from farm to homestead, perception of degradation, access to credit, training to land resource management, fear about land take-over by the government and total livestock holdings. Crop productivity improved significantly after land certification.
Other results of the study documents that farmers are predominantly willing to participate in voluntary land consolidation (66.8%). Significant determinants influencing the willingness of farmers for voluntary land consolidation are the exchange of parcels with neighbors, the expectation of better arranged parcels, the nearness of plots to the farmstead, and the perception that land fragmentation reduces agricultural productivity. The majority of farmers believes that land consolidation could reduce land use conflicts.
The outputs from this study can be used to assure sustainability in resource utilization, to enable proper land use planning, and to support decision-making. The results also can encourage policy makers to minimize the sources of insecurity, such as frustrations of future land redistribution and land taking without proper land compensation. Voluntary land consolidation could be a policy instrument to address the challenges of subsistence agriculture in Ethiopia.},
keywords = {CHange detection, Land Administration, Land readjustment, Land right certificate, land use},
pubstate = {published},
tppubtype = {phdthesis}
}
Preliminary remarks: 1. Information on land cover changes as well as the driving forces behind such changes underpin a proper understanding of the dynamics of land cover. 2. Tenure security is an important factor for land investment and for agricultural productivity. 3. Land consolidation is a proper tool to solve inefficiencies in agricultural production.
This study aims to examine the magnitude and rate of land cover change and to identify its major determinants. It aims to highlight effects of land certification on tenure security, land investment, crop productivity, and land dispute. Finally, it aims to assess the determinants, which influence the willingness of farmers to participate in voluntary land consolidation processes. The investigations were outlined in the Ethiopian Gozamin District and they are based on survey data collected from 343 randomly selected farm households, structured interviews, focus group discussions with farmers and expert panels. The collected data were analyzed quantitatively by using descriptive statistics and logistic regression models and they were complemented by qualitative data.
Satellite images of Landsat 5 (1986), Landsat 7 (2003), and Sentinel-2 (2018) were used to assess the dynamics of land cover. Focus group discussions, interviews, and farmers’ lived experiences through a household survey were applied to identify the factors for land cover changes based on the DPSIR (Driver-Pressure-State-Impact-Response) Framework. Results of the investigations revealed that during the last three decades the study area has undergone an extensive land cover change, primarily a shift from cropland and grassland into forests and built-up areas. Thus, quantitative land cover change detection between 1986 and 2018 revealed that cropland, grassland, and bare areas declined by 10.53%, 5.7%, and 2.49%. Forest, built-up, shrub/scattered vegetation, and water bodies expanded by 13.47%, 4.02%, 0.98%, and 0.25%. Population growth, the rural land tenure system, the overuse of land, the climate change, and the scarcity of grazing land could be identified as key drivers of these land cover changes.
The assessment of land tenure security indicated that most farm households feel that their land use rights are secure after the certification process. Only 17% fear that the government at any time could take their land use rights. Most farm households identified a reduction of disputes after certification and land management practices improved from 70.3% before certification to 90.1% after certification. As key factors for the increase of terracing and the application of manure, the study determined total farm size, the average distance from farm to homestead, perception of degradation, access to credit, training to land resource management, fear about land take-over by the government and total livestock holdings. Crop productivity improved significantly after land certification.
Other results of the study documents that farmers are predominantly willing to participate in voluntary land consolidation (66.8%). Significant determinants influencing the willingness of farmers for voluntary land consolidation are the exchange of parcels with neighbors, the expectation of better arranged parcels, the nearness of plots to the farmstead, and the perception that land fragmentation reduces agricultural productivity. The majority of farmers believes that land consolidation could reduce land use conflicts.
The outputs from this study can be used to assure sustainability in resource utilization, to enable proper land use planning, and to support decision-making. The results also can encourage policy makers to minimize the sources of insecurity, such as frustrations of future land redistribution and land taking without proper land compensation. Voluntary land consolidation could be a policy instrument to address the challenges of subsistence agriculture in Ethiopia.
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Mazurkiewicz, Bartosz; Kattenbeck, Markus; Kiefer, Peter; Giannopoulos, Ioannis
Not Arbitrary, Systematic! Average-Based Route Selection for Navigation Experiments Inproceedings
In: Janowicz, Krzysztof; Verstegen, Judith Anne (Ed.): 11th International Conference on Geographic Information Science, GIScience
2021, September 27-30, 2021, Poznań, Poland – Part I, pp. 8:1–8:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik, 2021.
@inproceedings{DBLP:conf/giscience/MazurkiewiczKKG21,
title = {Not Arbitrary, Systematic! Average-Based Route Selection for Navigation Experiments},
author = {Bartosz Mazurkiewicz and Markus Kattenbeck and Peter Kiefer and Ioannis Giannopoulos},
editor = {Krzysztof Janowicz and Judith Anne Verstegen},
url = {https://doi.org/10.4230/LIPIcs.GIScience.2021.I.8},
doi = {10.4230/LIPIcs.GIScience.2021.I.8},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
booktitle = {11th International Conference on Geographic Information Science, GIScience
2021, September 27-30, 2021, Poznań, Poland - Part I},
volume = {177},
pages = {8:1--8:16},
publisher = {Schloss Dagstuhl - Leibniz-Zentrum für Informatik},
series = {LIPIcs},
keywords = {experimental design, Navigation, Replicability, Route selection, Wayfinding},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2020
|
|
Cutchan, Marvin Mc; Özdal-Oktay, Simge; Giannopoulos, Ioannis
Semantic-based urban growth prediction Journal Article
In: Transactions in GIS, vol. n/a, no. n/a, 2020.
@article{doi:10.1111/tgis.12655b,
title = {Semantic-based urban growth prediction},
author = {Marvin {Mc Cutchan} and Simge Özdal-Oktay and Ioannis Giannopoulos},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/tgis.12655},
doi = {10.1111/tgis.12655},
year = {2020},
date = {2020-01-01},
journal = {Transactions in GIS},
volume = {n/a},
number = {n/a},
abstract = {Abstract Urban growth is a spatial process which has a significant impact on the earth’s environment. Research on predicting this complex process makes it therefore especially fruitful for decision-making on a global scale, as it enables the introduction of more sustainable urban development. This article presents a novel method of urban growth prediction. The method utilizes geospatial semantics in order to predict urban growth for a set of random areas in Europe. For this purpose, a feature space representing geospatial configurations was introduced which embeds semantic information. Data in this feature space was then used to perform deep learning, which ultimately enables the prediction of urban growth with high accuracy. The final results reveal that geospatial semantics hold great potential for spatial prediction tasks.},
keywords = {Deep learning, geosemantics, urban growth},
pubstate = {published},
tppubtype = {article}
}
Abstract Urban growth is a spatial process which has a significant impact on the earth’s environment. Research on predicting this complex process makes it therefore especially fruitful for decision-making on a global scale, as it enables the introduction of more sustainable urban development. This article presents a novel method of urban growth prediction. The method utilizes geospatial semantics in order to predict urban growth for a set of random areas in Europe. For this purpose, a feature space representing geospatial configurations was introduced which embeds semantic information. Data in this feature space was then used to perform deep learning, which ultimately enables the prediction of urban growth with high accuracy. The final results reveal that geospatial semantics hold great potential for spatial prediction tasks.
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Krieger, P; Kattenbeck, Markus; Ludwig, B; Helmbrecht, J; Giannopoulos, Ioannis
Hey You! Let’s Talk. Dialogue-Initiatives Revisited for Wayfinding Instructions Inproceedings
In: Partsinevelos, P.; Kyriakidis, P.; Kavouras, M. (Ed.): Proceedings of the 23rd AGILE Conference on Geographic Information Science, pp. 11, Copernicus Publications, 2020.
@inproceedings{agile-giss-1-11-2020,
title = {Hey You! Let’s Talk. Dialogue-Initiatives Revisited for Wayfinding Instructions},
author = {P Krieger and Markus Kattenbeck and B Ludwig and J Helmbrecht and Ioannis Giannopoulos},
editor = {P. Partsinevelos and P. Kyriakidis and M. Kavouras},
url = {https://agile-giss.copernicus.org/articles/1/11/2020/},
doi = {10.5194/agile-giss-1-11-2020},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
booktitle = {Proceedings of the 23rd AGILE Conference on Geographic Information Science},
journal = {AGILE: GIScience Series},
volume = {1},
pages = {11},
publisher = {Copernicus Publications},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
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|
Rudi, David; Kiefer, Peter; Giannopoulos, Ioannis; Raubal, Martin
Gaze-based interactions in the cockpit of the future: a survey Journal Article
In: Journal on Multimodal User Interfaces, vol. 14, no. 1, pp. 25–48, 2020.
@article{rudi2020gaze,
title = {Gaze-based interactions in the cockpit of the future: a survey},
author = {David Rudi and Peter Kiefer and Ioannis Giannopoulos and Martin Raubal},
year = {2020},
date = {2020-01-01},
journal = {Journal on Multimodal User Interfaces},
volume = {14},
number = {1},
pages = {25--48},
publisher = {Springer},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
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Navratil, Gerhard; Konturek, Philip; Giannopoulos, Ioannis
INTERACTING WITH 3D MODELS–3D-CAD VS. HOLOGRAPHIC MODELS Journal Article
In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. 6, pp. 129–134, 2020.
@article{navratil2020interacting,
title = {INTERACTING WITH 3D MODELS--3D-CAD VS. HOLOGRAPHIC MODELS},
author = {Gerhard Navratil and Philip Konturek and Ioannis Giannopoulos},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
volume = {6},
pages = {129--134},
publisher = {Copernicus GmbH},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
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Hernik, Jozef; Prus, Barbara; Dixon-Gough, Robert; Taszakowski, Jaroslaw; Navratil, Gerhard; Mansberger, Reinfried
Ŧhe Evolution of Cadastral Systems in Austria and Galicia (Poland): Đifferent Approaches to a Similar System from a Common Beginning Journal Article
In: Cartographic Journal, vol. 57, no. 2, pp. 97–112, 2020.
@article{TUW-289372,
title = {Ŧhe Evolution of Cadastral Systems in Austria and Galicia (Poland): Đifferent Approaches to a Similar System from a Common Beginning},
author = {Jozef Hernik and Barbara Prus and Robert Dixon-Gough and Jaroslaw Taszakowski and Gerhard Navratil and Reinfried Mansberger},
doi = {10.1080/00087041.2018.1534344},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {Cartographic Journal},
volume = {57},
number = {2},
pages = {97--112},
abstract = {The main aim of this paper is to document the gradual evolution of cadastral maps and associated land books in the area of today's Austria as well as the more dramatic development of the cadastral system in Galicia (Poland). Ŧhe continuous development of the Austrian system is compared to the more gradual evolution of the Polish system, the development of which was more complex because of the historical and political developments in this country's turbulent past. However both systems have common roots with the Franciscan Cadastre. The investigation is based on development of the legal instruments, the institutional settings, the technical procedures, and the final products of the respected countries. The comparison of the development in the two countries and the results of the investigated quality assessment of cadastral maps clearly document that the smooth development of a cadastre requires a stable political situation. The Austrian cadastre had already almost finished the period of consolidation, harmonization, and completion in 1938. This allowed a new area of further development to evolve after 1945. In Poland, the unfinished tasks of homogenization and harmonization in 1939 and the significant changes in the political system in 1945 delayed consolidation, harmonization, and completion of the cadastral system and impeded the continuous development of the system for the next decades.},
keywords = {Austria, Cadastre, Development, Poland},
pubstate = {published},
tppubtype = {article}
}
The main aim of this paper is to document the gradual evolution of cadastral maps and associated land books in the area of today’s Austria as well as the more dramatic development of the cadastral system in Galicia (Poland). Ŧhe continuous development of the Austrian system is compared to the more gradual evolution of the Polish system, the development of which was more complex because of the historical and political developments in this country’s turbulent past. However both systems have common roots with the Franciscan Cadastre. The investigation is based on development of the legal instruments, the institutional settings, the technical procedures, and the final products of the respected countries. The comparison of the development in the two countries and the results of the investigated quality assessment of cadastral maps clearly document that the smooth development of a cadastre requires a stable political situation. The Austrian cadastre had already almost finished the period of consolidation, harmonization, and completion in 1938. This allowed a new area of further development to evolve after 1945. In Poland, the unfinished tasks of homogenization and harmonization in 1939 and the significant changes in the political system in 1945 delayed consolidation, harmonization, and completion of the cadastral system and impeded the continuous development of the system for the next decades.
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Karabin, Marcin; Kitsakis, Dimitrios; Koeva, Mila; Navratil, Gerhard; Paasch, Jesper; Paulsson, Jenny; Vucic, Nikola; Janecka, Karel; Lisec, Anka
Layer Approach to Ownership in 3D Cadastre in the Case of Underground Tunnels Journal Article
In: Land Use Policy, vol. 98, no. November, 2020.
@article{TUW-290158,
title = {Layer Approach to Ownership in 3D Cadastre in the Case of Underground Tunnels},
author = {Marcin Karabin and Dimitrios Kitsakis and Mila Koeva and Gerhard Navratil and Jesper Paasch and Jenny Paulsson and Nikola Vucic and Karel Janecka and Anka Lisec},
doi = {10.1016/j.landusepol.2020.104464},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {Land Use Policy},
volume = {98},
number = {November},
abstract = {The paper focuses on approaches to the registration of real property rights in the case of underground or subway tunnels in different EU countries: Austria, Bulgaria, Czech Republic, Croatia, Greece, Poland, Slovenia, and Sweden. The authors conducted analysis on the registration of rights to subway tunnels in the chosen countries, including its effectiveness in ensuring appropriate property rights to construct and exploit tunnels. Special attention was given to limitations related to the lack of legal provisions vertically dividing space, i.e. into layers, and referring to the ownership right to the layers. Benefits which might be achieved by the introduction of a 3D real property subdivision were pointed out. Ŧhe analysis of the available data concerning the geometry of subway tunnels in particular countries was presented. Ŧhe authors tried to answer the question whether the accessible data concerning the geometry of subway tunnels allows to generate a 3D geospatial model of a constructed object, and to specify the space which should be determined as a 3D parcel in the 3D real property cadastre, for the purpose of registering property rights for the object (the tunnel).},
keywords = {3D cadastre, Layer Approach, Subway, Tunnel},
pubstate = {published},
tppubtype = {article}
}
The paper focuses on approaches to the registration of real property rights in the case of underground or subway tunnels in different EU countries: Austria, Bulgaria, Czech Republic, Croatia, Greece, Poland, Slovenia, and Sweden. The authors conducted analysis on the registration of rights to subway tunnels in the chosen countries, including its effectiveness in ensuring appropriate property rights to construct and exploit tunnels. Special attention was given to limitations related to the lack of legal provisions vertically dividing space, i.e. into layers, and referring to the ownership right to the layers. Benefits which might be achieved by the introduction of a 3D real property subdivision were pointed out. Ŧhe analysis of the available data concerning the geometry of subway tunnels in particular countries was presented. Ŧhe authors tried to answer the question whether the accessible data concerning the geometry of subway tunnels allows to generate a 3D geospatial model of a constructed object, and to specify the space which should be determined as a 3D parcel in the 3D real property cadastre, for the purpose of registering property rights for the object (the tunnel).
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Kofler, Georg; Navratil, Gerhard
Die Entwicklungen des Katasters und des Grundbuchs in Südtirol aus österreichischer Sicht Journal Article
In: Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), vol. 108, no. 2, pp. 58–72, 2020.
@article{TUW-289844,
title = {Die Entwicklungen des Katasters und des Grundbuchs in Südtirol aus österreichischer Sicht},
author = {Georg Kofler and Gerhard Navratil},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {Österreichische Zeitschrift für Vermessung und Geoinformation (VGI)},
volume = {108},
number = {2},
pages = {58--72},
abstract = {100 years have passed since the old Austrian land register for South Tyrol was handed over to the Italian state in 1919. As in Austria, the cadastre plays an important role in South Tyrol with its connection to the land register. Đue to its longstanding existence and constant further development, the modern cadastre fulfils far more requirements than were initially placed on it. A summary of the developments in South Tyrol also shows developments that are interesting for other countries, such as the building cadastre. A comparison with Austria shows parallel developments but also differences.},
keywords = {Cadastre, Development, Land Register, South Tyrol},
pubstate = {published},
tppubtype = {article}
}
100 years have passed since the old Austrian land register for South Tyrol was handed over to the Italian state in 1919. As in Austria, the cadastre plays an important role in South Tyrol with its connection to the land register. Đue to its longstanding existence and constant further development, the modern cadastre fulfils far more requirements than were initially placed on it. A summary of the developments in South Tyrol also shows developments that are interesting for other countries, such as the building cadastre. A comparison with Austria shows parallel developments but also differences.
|
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Navratil, Gerhard; Konturek, Philip; Giannopoulos, Ioannis
Interacting with 3D Models – 3D-CAD vs. Holographic Models Journal Article
In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. VI-4/W1-2020, pp. 129–134, 2020.
@article{TUW-291881,
title = {Interacting with 3D Models - 3D-CAD vs. Holographic Models},
author = {Gerhard Navratil and Philip Konturek and Ioannis Giannopoulos},
url = {https://publik.tuwien.ac.at/files/publik_291881.pdf},
doi = {10.5194/isprs-annals-VI-4-W1-2020-129-2020},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
volume = {VI-4/W1-2020},
pages = {129--134},
abstract = {A problem with 3D models is that devices used to display them are typically two-dimensional, i.e., computer monitors or printed maps. User interfaces of computer software are based on mouse, touchscreen, keyboards, etc. and are optimized for this dimensionality. However, this causes problems when working with 3D models and the user must adapt her actions by interpreting the missing third dimension. While this might not necessarily pose a problem for frequent users, infrequent users may find this quite challenging. Holographic models, on the other hand, float in front of the user, providing a 3D perspective. Interaction with this kind of models may thus be more intuitive than traditional interaction. In the paper we present the results from a first user test. 15 participants tested interaction with a holographic model visualized using Augmented Reality (AR) technology. The results were compared to those of 15 participants using a traditional 3D-CAD. It was found that the holographic approach is more intuitive leading to a lower frustration level although it is still restricted by technical limitations.},
keywords = {3D CAD, augmented reality, Holographic model, Test, Usability, User experience},
pubstate = {published},
tppubtype = {article}
}
A problem with 3D models is that devices used to display them are typically two-dimensional, i.e., computer monitors or printed maps. User interfaces of computer software are based on mouse, touchscreen, keyboards, etc. and are optimized for this dimensionality. However, this causes problems when working with 3D models and the user must adapt her actions by interpreting the missing third dimension. While this might not necessarily pose a problem for frequent users, infrequent users may find this quite challenging. Holographic models, on the other hand, float in front of the user, providing a 3D perspective. Interaction with this kind of models may thus be more intuitive than traditional interaction. In the paper we present the results from a first user test. 15 participants tested interaction with a holographic model visualized using Augmented Reality (AR) technology. The results were compared to those of 15 participants using a traditional 3D-CAD. It was found that the holographic approach is more intuitive leading to a lower frustration level although it is still restricted by technical limitations.
|
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Navratil, Gerhard
Applications of GIScience for Land Administration Journal Article
In: ISPRS International Journal of Geo-Information, vol. 9, no. 7, 2020, (invited).
@article{TUW-289556,
title = {Applications of GIScience for Land Administration},
author = {Gerhard Navratil},
url = {https://publik.tuwien.ac.at/files/publik_289556.pdf},
doi = {10.3390/ijgi9070416},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {ISPRS International Journal of Geo-Information},
volume = {9},
number = {7},
abstract = {Land administration is an essential part of public administration. Geographic Information Science (GIScience) deals with the concepts, principles, and models of geographic information. Land administration has always adopted new technological and scientific developments and thus it is reasonable to check, which results from GIScience can be used to improve land administration systems. This editorial paper introduces the key research areas for land administration. After that, 12 original papers are presented, which provide a general picture of recent trends in land administration research. This Special Issue shows that land administration as a scientific field is still evolving and adopting to the changing societal needs.},
note = {invited},
keywords = {3D, GIS, GIScience, LADM, Land Administration, Land value},
pubstate = {published},
tppubtype = {article}
}
Land administration is an essential part of public administration. Geographic Information Science (GIScience) deals with the concepts, principles, and models of geographic information. Land administration has always adopted new technological and scientific developments and thus it is reasonable to check, which results from GIScience can be used to improve land administration systems. This editorial paper introduces the key research areas for land administration. After that, 12 original papers are presented, which provide a general picture of recent trends in land administration research. This Special Issue shows that land administration as a scientific field is still evolving and adopting to the changing societal needs.
|
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Pichler, Hannah; Navratil, Gerhard
Nutzung von Grundbuchsdaten zum Aufzeigen sozialer Entwicklungen Inproceedings
In: Strobl, Josef; Zagel, Bernhard; Griesebner, Gerald; Blaschke, Thomas (Ed.): AGIT Journal für Angewandte Geoinformatik, pp. 91–100, Wichmann Verlag, Berlin, 2020, ISSN: 2364-9283, (talk: Online Conference AGIŦ 2020, Salzburg; 2020-07-06 — 2020-07-10).
@inproceedings{TUW-289557,
title = {Nutzung von Grundbuchsdaten zum Aufzeigen sozialer Entwicklungen},
author = {Hannah Pichler and Gerhard Navratil},
editor = {Josef Strobl and Bernhard Zagel and Gerald Griesebner and Thomas Blaschke},
doi = {10.14627/537698009},
issn = {2364-9283},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
booktitle = {AGIT Journal für Angewandte Geoinformatik},
pages = {91--100},
publisher = {Wichmann Verlag},
address = {Berlin},
abstract = {In Austria, land registration data describe one aspect of society for the last 140 years. The paper discusses if and how these data can made available to describe societal changes. The sample question used as a motivating example is the analysis of the gender land gap.},
note = {talk: Online Conference AGIŦ 2020, Salzburg; 2020-07-06 -- 2020-07-10},
keywords = {Change, Gender, Land gap, Land Register},
pubstate = {published},
tppubtype = {inproceedings}
}
In Austria, land registration data describe one aspect of society for the last 140 years. The paper discusses if and how these data can made available to describe societal changes. The sample question used as a motivating example is the analysis of the gender land gap.
|
2019
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Giannopoulos, Ioannis; Schmidtke, Hedda (Ed.)
COSIT 2019 Doctoral Colloquium Proceedings Book
Universität Regensburg, Regensburg, 2019.
@book{giannopoulos19[TUW-286388],
title = {COSIT 2019 Doctoral Colloquium Proceedings},
editor = {Ioannis Giannopoulos and Hedda Schmidtke},
year = {2019},
date = {2019-01-01},
publisher = {Universität Regensburg},
address = {Regensburg},
abstract = {Proceedings der Extended Abstracts für das Doktorandentreffen im Rahmen der COSIT 2019.},
keywords = {Doctoral Colloquium, geoinformation, GIS},
pubstate = {published},
tppubtype = {book}
}
Proceedings der Extended Abstracts für das Doktorandentreffen im Rahmen der COSIT 2019.
|
|
Timpf, Sabine; Schlieder, Christoph; Kattenbeck, Markus; Ludwig, Bernd; Stewart, Kathleen (Ed.)
Proceedings of the 14th International Conference onSpatial Information Theory Book
Dagstuhl Publishing, Saarbrücken, 2019, ISBN: 978-3-95977-115-3.
@book{timpf19[TUW-284647],
title = {Proceedings of the 14th International Conference onSpatial Information Theory},
editor = {Sabine Timpf and Christoph Schlieder and Markus Kattenbeck and Bernd Ludwig and Kathleen Stewart},
isbn = {978-3-95977-115-3},
year = {2019},
date = {2019-01-01},
publisher = {Dagstuhl Publishing},
address = {Saarbrücken},
abstract = {Tagungsband der Cosit 2019},
keywords = {Geographic information systems, Location Based Services, Natural Language Processing, Spatial and physical reasoning},
pubstate = {published},
tppubtype = {book}
}
Tagungsband der Cosit 2019
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Ernst, Julius; Mansberger, Reinfried; Muggenhuber, Gerhard; Navratil, Gerhard; Ozlberger, Stefan; Twaroch, Christoph
Der Grenzkataster in Österreich: Eine Erfolgsgeschichte? Journal Article
In: Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), vol. 144. Jahrgang, no. 5, pp. 307–316, 2019.
@article{ernst19:307[TUW-281619],
title = {Der Grenzkataster in Österreich: Eine Erfolgsgeschichte?},
author = {Julius Ernst and Reinfried Mansberger and Gerhard Muggenhuber and Gerhard Navratil and Stefan Ozlberger and Christoph Twaroch},
doi = {10.12902/zfv-0254-2019},
year = {2019},
date = {2019-01-01},
journal = {Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv)},
volume = {144. Jahrgang},
number = {5},
pages = {307--316},
abstract = {Im Jahr 2019 feiert das österreichische Vermessungsgesetz sein 50-jähriges Bestehen. Das Inkrafttreten dieses Gesetzes war auch die Geburtsstunde für den österreichischen Grenzkataster und damit ein Meilenstein zur Gewährleistung der Rechtssicherheit von Grundstücksgrenzen. Das Jubiläum ist Anlass, Entwicklung, Umsetzung und Führung des Grenzkatasters einer breiteren wissenschaftlichen Öffentlichkeit vorzustellen. Nach einer kurzen Geschichte des österreichischen Katasters wird der Prozess des Übergangs von einem Steuerkataster zu einem Grenzkataster beschrieben. Die aktuelle Situation mit Stärken und Schwächen des Systems wird skizziert und geplante Entwicklungen werden vorgestellt},
keywords = {Geschichte, Grenzkataster, Kataster, Schw{ä}chen, St{ä}rken},
pubstate = {published},
tppubtype = {article}
}
Im Jahr 2019 feiert das österreichische Vermessungsgesetz sein 50-jähriges Bestehen. Das Inkrafttreten dieses Gesetzes war auch die Geburtsstunde für den österreichischen Grenzkataster und damit ein Meilenstein zur Gewährleistung der Rechtssicherheit von Grundstücksgrenzen. Das Jubiläum ist Anlass, Entwicklung, Umsetzung und Führung des Grenzkatasters einer breiteren wissenschaftlichen Öffentlichkeit vorzustellen. Nach einer kurzen Geschichte des österreichischen Katasters wird der Prozess des Übergangs von einem Steuerkataster zu einem Grenzkataster beschrieben. Die aktuelle Situation mit Stärken und Schwächen des Systems wird skizziert und geplante Entwicklungen werden vorgestellt
|
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Ernst, Julius; Mansberger, Reinfried; Muggenhuber, Gerhard; Navratil, Gerhard; Ozlberger, Stefan; Twaroch, Christoph
The Legal Boundary Cadastre in Austria: A Success Story? Journal Article
In: Geodetski Vestnik, vol. 63, no. 2, pp. 234–249, 2019.
@article{ernst19:234[TUW-280362],
title = {The Legal Boundary Cadastre in Austria: A Success Story?},
author = {Julius Ernst and Reinfried Mansberger and Gerhard Muggenhuber and Gerhard Navratil and Stefan Ozlberger and Christoph Twaroch},
doi = {10.15292/geodetski-vestnik.2019.02.234-249},
year = {2019},
date = {2019-01-01},
journal = {Geodetski Vestnik},
volume = {63},
number = {2},
pages = {234--249},
abstract = {In 2019, the Austrian surveyors will celebrate the 50 years anniversary of the enactment of the Austrian Surveying Act. The date of the enactment of this law was also the hour of birth for the Austrian Legal Boundary Cadastre (germ. der Grenzkataster) and with it a milestone to ensure the legal security of parcel boundaries. The jubilee is taken as the occasion to introduce the development, implementation and running of the Legal Boundary Cadastre to a wider scientific community. After a short history of the Austrian Cadastre, the process of its transition from the Fiscal Cadastre to the Legal Boundary Cadastre is documented in the article. The current situation with strengths and weaknesses of the system is outlined and scheduledpar
developments are introduced.},
keywords = {Austria, fiscal cadastre, Land administration system, Land Cadastre, Land Register, Legal Boundary Cadastre, Surveying Law},
pubstate = {published},
tppubtype = {article}
}
In 2019, the Austrian surveyors will celebrate the 50 years anniversary of the enactment of the Austrian Surveying Act. The date of the enactment of this law was also the hour of birth for the Austrian Legal Boundary Cadastre (germ. der Grenzkataster) and with it a milestone to ensure the legal security of parcel boundaries. The jubilee is taken as the occasion to introduce the development, implementation and running of the Legal Boundary Cadastre to a wider scientific community. After a short history of the Austrian Cadastre, the process of its transition from the Fiscal Cadastre to the Legal Boundary Cadastre is documented in the article. The current situation with strengths and weaknesses of the system is outlined and scheduledpar
developments are introduced.
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|
Giannopoulos, Ioannis
Geheimnisse, die von Wänden undErdoberflächen versteckt werden, einfach ansehen? Journal Article
In: Bulletin TU Wien alumni club, vol. 47, no. Juni, 2019.
@article{giannopoulos19[TUW-286360],
title = {Geheimnisse, die von Wänden undErdoberflächen versteckt werden, einfach ansehen?},
author = {Ioannis Giannopoulos},
url = {https://publik.tuwien.ac.at/files/publik_286360.pdf},
year = {2019},
date = {2019-01-01},
journal = {Bulletin TU Wien alumni club},
volume = {47},
number = {Juni},
abstract = {Während wir uns im Außenbereich bewegen und mit dem Raum interagieren, nehmen wir nur physische Objekte wie Gebäude, Straßen und andere Fußgänger in der Nähe wahr. Aber unsere Welt ist voll verborgener Informationen, z.B. unterirdischen Elemente, die von der Bodenoberfläche und den Gebäudewänden verdeckt werden oder von georeferenzierten Informationen, die im Internet, aber nicht im realen Raum zu finden sind. Diese Informationen können Geschichten erzählen oder sogar einen bestimmten Ort charakterisieren},
keywords = {augmented reality, geoinformation, unterirdisch},
pubstate = {published},
tppubtype = {article}
}
Während wir uns im Außenbereich bewegen und mit dem Raum interagieren, nehmen wir nur physische Objekte wie Gebäude, Straßen und andere Fußgänger in der Nähe wahr. Aber unsere Welt ist voll verborgener Informationen, z.B. unterirdischen Elemente, die von der Bodenoberfläche und den Gebäudewänden verdeckt werden oder von georeferenzierten Informationen, die im Internet, aber nicht im realen Raum zu finden sind. Diese Informationen können Geschichten erzählen oder sogar einen bestimmten Ort charakterisieren
|
|
Giannopoulos, Ioannis; Navratil, Gerhard; Fogliaroni, Paolo; Özdal-Oktay, Simge; McCutchan, Marvin; Mazurkiewicz, Bartosz
Geoinformation Research Directions Journal Article
In: Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), vol. 107. Jahrgang, no. 2, pp. 147–155, 2019.
@article{giannopoulos19:147[TUW-286409],
title = {Geoinformation Research Directions},
author = {Ioannis Giannopoulos and Gerhard Navratil and Paolo Fogliaroni and Simge Özdal-Oktay and Marvin McCutchan and Bartosz Mazurkiewicz},
year = {2019},
date = {2019-01-01},
journal = {Österreichische Zeitschrift für Vermessung und Geoinformation (VGI)},
volume = {107. Jahrgang},
number = {2},
pages = {147--155},
abstract = {Dieser Artikel stellt die Forschungsrichtungen der Forschungsgruppe Geoinformation an der Technischen Universität Wien vor. Wenn wir uns in einer realen oder virtuellen Umgebung bewegen und mit unserer direkten Umgebung, z. B. Gebäuden, interagieren, produzieren wir raumbezogene Spuren. Durch die effiziente und effektive Analyse dieser vom Menschen erzeugten Daten, aber auch von der städtischen Umwelt, sind wir in der Lage, mehrere Forschungsfragen des Bereichs zu beantworten. Zum Beispiel können wir die Struktur der Umwelt, in der wir leben, aufdecken, die Auswirkungen der Umwelt auf die menschliche Entscheidungsfindung untersuchen, verstehen wie Menschen mit der Umwelt interagieren, sowie neue raumbezogene Visualisierungen und Interaktionsdialoge ermöglichen. Neuartige Technologien wie Virtual and Augmented Reality sowie Eye Tracking befähigen uns, einen Schritt weiter zu gehen und komplexe Experimente durchzuführen, um relevante raumbezogene Daten zu generieren, die es uns ermöglichen, den Entscheidungsprozess des Menschen in kontrollierten Umgebungen zu untersuchen und zu verstehen. Darüber hinaus können wir aufgrund des aktuellen technologischen Fortschritts der Forschungsgruppe für Geoinformation die AR-Technologie nun auch im Außenbereich einsetzen, um georeferenzierte Objekte in Echtzeit zu visualisieren. Dies erlaubt uns, Experimente auch in natürlicher Umgebung durchzuführen und die räumliche Information, die der Mensch mit Hilfe unserer entwickelten Technologie wahrnehmen kann, zu verändern.},
keywords = {3D-Kataster, gemischte Realit{ä}t, Navigation, R{ä}umliches maschinelles Lernen, St{ä}dtisches Computing},
pubstate = {published},
tppubtype = {article}
}
Dieser Artikel stellt die Forschungsrichtungen der Forschungsgruppe Geoinformation an der Technischen Universität Wien vor. Wenn wir uns in einer realen oder virtuellen Umgebung bewegen und mit unserer direkten Umgebung, z. B. Gebäuden, interagieren, produzieren wir raumbezogene Spuren. Durch die effiziente und effektive Analyse dieser vom Menschen erzeugten Daten, aber auch von der städtischen Umwelt, sind wir in der Lage, mehrere Forschungsfragen des Bereichs zu beantworten. Zum Beispiel können wir die Struktur der Umwelt, in der wir leben, aufdecken, die Auswirkungen der Umwelt auf die menschliche Entscheidungsfindung untersuchen, verstehen wie Menschen mit der Umwelt interagieren, sowie neue raumbezogene Visualisierungen und Interaktionsdialoge ermöglichen. Neuartige Technologien wie Virtual and Augmented Reality sowie Eye Tracking befähigen uns, einen Schritt weiter zu gehen und komplexe Experimente durchzuführen, um relevante raumbezogene Daten zu generieren, die es uns ermöglichen, den Entscheidungsprozess des Menschen in kontrollierten Umgebungen zu untersuchen und zu verstehen. Darüber hinaus können wir aufgrund des aktuellen technologischen Fortschritts der Forschungsgruppe für Geoinformation die AR-Technologie nun auch im Außenbereich einsetzen, um georeferenzierte Objekte in Echtzeit zu visualisieren. Dies erlaubt uns, Experimente auch in natürlicher Umgebung durchzuführen und die räumliche Information, die der Mensch mit Hilfe unserer entwickelten Technologie wahrnehmen kann, zu verändern.
|
|
Janecka, Karel; Navratil, Gerhard
Geospatial Data in Support of 3D Cadastre Journal Article
In: GIM International, vol. 33, no. 3, pp. 22–25, 2019.
@article{janecka19:22[TUW-279770],
title = {Geospatial Data in Support of 3D Cadastre},
author = {Karel Janecka and Gerhard Navratil},
year = {2019},
date = {2019-01-01},
journal = {GIM International},
volume = {33},
number = {3},
pages = {22--25},
abstract = {The urbanization trend is leading to an increasing number of people living in cities, thus also placing new demands on cadastral registration. To be able to register the complex infrastructures and built-up areas properly, the cadastre will need to consider the third spatial dimension. The 3D cadastre is based on 3D parcels (spatial units) which are single volumes (or multiple volumes) of space. Although the technology offers numerous possibilities for implementation of the 3D cadastre, there are still some open issues, as this article explains.},
keywords = {3D, augmented reality, Kataster, Landadministration, Modelliierung, Standardisierung},
pubstate = {published},
tppubtype = {article}
}
The urbanization trend is leading to an increasing number of people living in cities, thus also placing new demands on cadastral registration. To be able to register the complex infrastructures and built-up areas properly, the cadastre will need to consider the third spatial dimension. The 3D cadastre is based on 3D parcels (spatial units) which are single volumes (or multiple volumes) of space. Although the technology offers numerous possibilities for implementation of the 3D cadastre, there are still some open issues, as this article explains.
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Masum, Audrey; Mansberger, Reinfried; Martin, Audrey; Navratil, Gerhard; Mushinge, Anthony
Adapting the Surveying Curriculum to New Dimensions of the Profession Journal Article
In: Journal of Professional Issues in Engineering Education and Practice, vol. 145, no. 2, pp. 04019003-1–04019003-9, 2019.
@article{masum19:04019003-1[TUW-279558],
title = {Adapting the Surveying Curriculum to New Dimensions of the Profession},
author = {Audrey Masum and Reinfried Mansberger and Audrey Martin and Gerhard Navratil and Anthony Mushinge},
doi = {10.1061/(ASCE)EI.1943-5541.0000408},
year = {2019},
date = {2019-01-01},
journal = {Journal of Professional Issues in Engineering Education and Practice},
volume = {145},
number = {2},
pages = {04019003-1--04019003-9},
abstract = {Today the surveying profession is very different from what it was twenty years ago. Recent technological innovations, globalization, and global land-related challenges have allowed a wide range of advances in the surveying profession. The vision is to promote surveying practices that can enhance the quality of services in a variety of tracks in the land profession. According to the new adjacent professional areas and the needs of the labor market, academic courses for surveyors have to be adapted to meet the broader scope of the surveying profession and to supply highly qualified land professionals. This paper outlines the new challenges for the surveying profession and highlights the core skills, competencies, and knowledge that should be highly valued to produce competent experts. Furthermore, this paper suggests a common structure of a surveying curriculum to capture the new academic themes for better adaptation to the broader scope of the surveying profession.},
keywords = {Geod{ä}sie, Geodäsie, Städtisches Computing},
pubstate = {published},
tppubtype = {article}
}
Today the surveying profession is very different from what it was twenty years ago. Recent technological innovations, globalization, and global land-related challenges have allowed a wide range of advances in the surveying profession. The vision is to promote surveying practices that can enhance the quality of services in a variety of tracks in the land profession. According to the new adjacent professional areas and the needs of the labor market, academic courses for surveyors have to be adapted to meet the broader scope of the surveying profession and to supply highly qualified land professionals. This paper outlines the new challenges for the surveying profession and highlights the core skills, competencies, and knowledge that should be highly valued to produce competent experts. Furthermore, this paper suggests a common structure of a surveying curriculum to capture the new academic themes for better adaptation to the broader scope of the surveying profession.
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Navratil, Gerhard
OpenStreetMap als kommunale Kartengrundlage Journal Article
In: gis.Business, vol. 2019, no. 3, pp. 2–4, 2019, (eingeladen).
@article{navratil19:2[TUW-281994],
title = {OpenStreetMap als kommunale Kartengrundlage},
author = {Gerhard Navratil},
year = {2019},
date = {2019-01-01},
journal = {gis.Business},
volume = {2019},
number = {3},
pages = {2--4},
abstract = {Die digitalen Stadtpläne vieler Städte sind ungenau oder unvollständig. Ein Ansatz wäre es, mit freiwillig zur Verfügung gestellten geographischen Daten (Volunteered Geographic Information - VGI) Städte qualitativ hochwertig und dennoch günstig zu kartieren. Dieser Ansatz wurde in der italienischen Stadt L'Aquila erprobt. Als Kartierungsplattform wurde OpenStreetMap (OSM) gewählt.},
note = {eingeladen},
keywords = {Kartographie, OSM, VGI},
pubstate = {published},
tppubtype = {article}
}
Die digitalen Stadtpläne vieler Städte sind ungenau oder unvollständig. Ein Ansatz wäre es, mit freiwillig zur Verfügung gestellten geographischen Daten (Volunteered Geographic Information – VGI) Städte qualitativ hochwertig und dennoch günstig zu kartieren. Dieser Ansatz wurde in der italienischen Stadt L’Aquila erprobt. Als Kartierungsplattform wurde OpenStreetMap (OSM) gewählt.
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Navratil, Gerhard; Mansberger, Reinfried
Unterrichten in Afrika Journal Article
In: frei.haus, vol. 50, no. Juni, 2019.
@article{navratil19[TUW-286362],
title = {Unterrichten in Afrika},
author = {Gerhard Navratil and Reinfried Mansberger},
year = {2019},
date = {2019-01-01},
journal = {frei.haus},
volume = {50},
number = {Juni},
abstract = {Das Unterrichten an Universitäten in fremden Ländern - und besonderspar
in Ländern des Südens - ist für alle Lehrenden eine Herausforderung impar
Hinblick auf didaktische, organisatorische und technische Fähigkeiten.par
Und es relativiert einige Schwächen, welche an unseren Universitätenpar
kritisiert werden ...},
keywords = {{Ä}thiopien, Entwicklungshilfe, Landadministration, Unterrichten},
pubstate = {published},
tppubtype = {article}
}
Das Unterrichten an Universitäten in fremden Ländern – und besonderspar
in Ländern des Südens – ist für alle Lehrenden eine Herausforderung impar
Hinblick auf didaktische, organisatorische und technische Fähigkeiten.par
Und es relativiert einige Schwächen, welche an unseren Universitätenpar
kritisiert werden …
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Mansberger, Reinfried; Agegnehu, Sayeh Kassaw; Navratil, Gerhard; Shibeshi, Gebeyehu Belay
Equal Partnership in the Capacity Building Project ”EduLand2”: Conceptual Design, Implementation, Success, Chalanges & Lessions Learnt Inproceedings
In: Land and Poverty Conference 2019: Catalyzing Innovation, 2019, (Vortrag: 20th Annual World Bank Conference on Land and Poverty: Catalyzing Innovation, Washington DC; 2019-03-25 — 2019-03-29).
@inproceedings{mansberger19[TUW-279067],
title = {Equal Partnership in the Capacity Building Project ''EduLand2'': Conceptual Design, Implementation, Success, Chalanges & Lessions Learnt},
author = {Reinfried Mansberger and Sayeh Kassaw Agegnehu and Gerhard Navratil and Gebeyehu Belay Shibeshi},
url = {https://publik.tuwien.ac.at/files/publik_279067.pdf},
year = {2019},
date = {2019-01-01},
booktitle = {Land and Poverty Conference 2019: Catalyzing Innovation},
abstract = {The capacity building project ''Implementation of Academic Land Administration Education in Ethiopia for Supporting Sustainable Development is a bilateral project between Austrian (BOKU Vienna, TU Vienna) and Ethiopian universities (DMU, BDU), funded by the Austrian Development Agency.par
EduLAND2 is a trigger for the design and running a research-driven bachelor curriculum at DMU, for joint problem-oriented research, for the building academic staff capability, for joint research activities and for the preparation of demand driven community services - all on the topic of land administration.par
Gender mainstreaming and the principle of equal partnerships between all project partners are central elements of EduLAND2. The presentation considers the conceptual design and the realization for guaranteeing an equal partnership in the project. Based on the experiences gained by project members in EduLAND2, challenges and success factors for a successful and equal partnership are outlined. Recommendations for a long-term and successful equal partnership are given.},
note = {Vortrag: 20th Annual World Bank Conference on Land and Poverty: Catalyzing Innovation, Washington DC; 2019-03-25 -- 2019-03-29},
keywords = {Capacity Building, Education, Equal Partnership, Land Administration},
pubstate = {published},
tppubtype = {inproceedings}
}
The capacity building project ”Implementation of Academic Land Administration Education in Ethiopia for Supporting Sustainable Development is a bilateral project between Austrian (BOKU Vienna, TU Vienna) and Ethiopian universities (DMU, BDU), funded by the Austrian Development Agency.par
EduLAND2 is a trigger for the design and running a research-driven bachelor curriculum at DMU, for joint problem-oriented research, for the building academic staff capability, for joint research activities and for the preparation of demand driven community services – all on the topic of land administration.par
Gender mainstreaming and the principle of equal partnerships between all project partners are central elements of EduLAND2. The presentation considers the conceptual design and the realization for guaranteeing an equal partnership in the project. Based on the experiences gained by project members in EduLAND2, challenges and success factors for a successful and equal partnership are outlined. Recommendations for a long-term and successful equal partnership are given.
|
|
Giannopoulos, Ioannis
Gaze-Based Assistance for Collective Spatial Cognition Inproceedings
In: Curtin, Kevin M; Montello, Daniel R (Ed.): Innovative Research about Spatial Thinking by Human Groups, Laboratory for Location Science, University of Alabama, 2019, (Vortrag: Collective Spatial Cognition Specialist Meeting, Santa Barbara, California, USA; 2019-04-17 — 2019-04-19).
@inproceedings{giannopoulos19[TUW-286401],
title = {Gaze-Based Assistance for Collective Spatial Cognition},
author = {Ioannis Giannopoulos},
editor = {Kevin M Curtin and Daniel R Montello},
year = {2019},
date = {2019-01-01},
booktitle = {Innovative Research about Spatial Thinking by Human Groups},
publisher = {Laboratory for Location Science, University of Alabama},
abstract = {When we walk and interact in an unfamiliar environment, wayfinding can be very challenging. We have to select a proper route than will lead us to the desired destination, we have to orient in our surroundings, we have to monitor our environment while walking to ensure that we are still on the right track and finally we have to recognize the destination. Furthermore, while we are wayfinding, we are acquiring spatial knowledge, developing and enhancing our mental representation of the environment we are interacting in. Assistance aids can be utilized for this purpose, helping us to offload some of the relevant tasks. Furthermore, assistance systems can help us to coordinate our activities with others, communicate, as well as increase our knowledge concerning the relevant environment. An assistance system that knows what we have seen, what we are interested in and what we want to achieve can be effectively utilized to support the process of wayfinding. Eye tracking data can be a great source, close to our cognitive processes, that can be utilized for the extraction of this relevant information that will help to coordinate and manage the spatial cognition of a person or even of a larger group of people. This position paper demonstrates how research in the area of gaze-based assistance can be utilized for acquiring, organizing and utilizing spatial knowledge of a group of people through the example of a group of tourists.},
note = {Vortrag: Collective Spatial Cognition Specialist Meeting, Santa Barbara, California, USA; 2019-04-17 -- 2019-04-19},
keywords = {Assistance Systems, Collective Spatial Cognition, Eye Movements, gaze-based interaction, Wayfinding},
pubstate = {published},
tppubtype = {inproceedings}
}
When we walk and interact in an unfamiliar environment, wayfinding can be very challenging. We have to select a proper route than will lead us to the desired destination, we have to orient in our surroundings, we have to monitor our environment while walking to ensure that we are still on the right track and finally we have to recognize the destination. Furthermore, while we are wayfinding, we are acquiring spatial knowledge, developing and enhancing our mental representation of the environment we are interacting in. Assistance aids can be utilized for this purpose, helping us to offload some of the relevant tasks. Furthermore, assistance systems can help us to coordinate our activities with others, communicate, as well as increase our knowledge concerning the relevant environment. An assistance system that knows what we have seen, what we are interested in and what we want to achieve can be effectively utilized to support the process of wayfinding. Eye tracking data can be a great source, close to our cognitive processes, that can be utilized for the extraction of this relevant information that will help to coordinate and manage the spatial cognition of a person or even of a larger group of people. This position paper demonstrates how research in the area of gaze-based assistance can be utilized for acquiring, organizing and utilizing spatial knowledge of a group of people through the example of a group of tourists.
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McCutchan, Marvin; Özdal-Oktay, Simge; Giannopoulos, Ioannis
Urban Growth Predictions with Deep Learning and Geosemantics Inproceedings
In: Ehrmann, Katharina; Khosravi, Hamid Reza Mansouri; others, (Ed.): VIENNA Young Scientists Symposium (VSS 2019), pp. 30–31, Book-of-Abstracts.com, Gumpoldskirchen, 2019, ISBN: 978-3-9504017-9-0, (Vortrag: VIENNA Young Scientists Symposium (VSS 2019), Wien; 2019-06-13 — 2019-06-14).
@inproceedings{mccutchan19:30[TUW-286504],
title = {Urban Growth Predictions with Deep Learning and Geosemantics},
author = {Marvin McCutchan and Simge Özdal-Oktay and Ioannis Giannopoulos},
editor = {Katharina Ehrmann and Hamid Reza Mansouri Khosravi and others},
isbn = {978-3-9504017-9-0},
year = {2019},
date = {2019-01-01},
booktitle = {VIENNA Young Scientists Symposium (VSS 2019)},
pages = {30--31},
publisher = {Book-of-Abstracts.com},
address = {Gumpoldskirchen},
abstract = {This work outlines a novel approach for the prediction of urban growth. The method extracts semantic information of geospatial data and predicts if urban and non-urban areas are going to change in the future, using a deep neural network. The scored prediction accuracy is higher than any other urban growth prediction model. This superiority is based on two novelties: (1) The effective modeling of the geospatial configurations using semantics, (2) the use of deep learning. The proposed method is therefore an effective tool to predict one of the global challenges of urban sprawl and support the future development strategies.},
note = {Vortrag: VIENNA Young Scientists Symposium (VSS 2019), Wien; 2019-06-13 -- 2019-06-14},
keywords = {Deep learning, geosemantics, urban growth},
pubstate = {published},
tppubtype = {inproceedings}
}
This work outlines a novel approach for the prediction of urban growth. The method extracts semantic information of geospatial data and predicts if urban and non-urban areas are going to change in the future, using a deep neural network. The scored prediction accuracy is higher than any other urban growth prediction model. This superiority is based on two novelties: (1) The effective modeling of the geospatial configurations using semantics, (2) the use of deep learning. The proposed method is therefore an effective tool to predict one of the global challenges of urban sprawl and support the future development strategies.
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Navratil, Gerhard; Giannopoulos, Ioannis; Kotzbek, Gilbert
Classification of Urban and Rural Routes based on Motorcycle Riding Behaviour Inproceedings
In: Kyriakidis, Phaedon; others, (Ed.): Geospatial Technologies for Local and Regional Development, pp. 95–108, Springer, 2019, ISBN: 978-3-030-14744-0, (Vortrag: 22nd AGILE Conference on Geographic Information Science, Limassol; 2019-06-17 — 2019-06-20).
@inproceedings{navratil19:95[TUW-281622],
title = {Classification of Urban and Rural Routes based on Motorcycle Riding Behaviour},
author = {Gerhard Navratil and Ioannis Giannopoulos and Gilbert Kotzbek},
editor = {Phaedon Kyriakidis and others},
isbn = {978-3-030-14744-0},
year = {2019},
date = {2019-01-01},
booktitle = {Geospatial Technologies for Local and Regional Development},
pages = {95--108},
publisher = {Springer},
abstract = {A basic problem in navigation is the selection of a suitable route. This requires a determination of costs or suitability. There are approaches for many standard situations, e.g., the shortest route for pedestrians, the fastest route for cars, a physically possible and legal route for trucks, or the safest route for bicycle riders. However, not much research has been done yet for motorcycle riders. Published approaches rely on interpretation of geometry, interviews, or user feedback. None of these approaches is precise and scalable. Since modern motorcycles have an increasing number of internal sensors (e.g., lean angle sensors for curve ABS), they could provide the data required for a classification of route segments. The combination with a navigational device allows to georeferenced the data and thus attach riding characteristics to a specific road segment. This work sketches the classification concept and presents data from a real-driving experiment using an external IMU.},
note = {Vortrag: 22nd AGILE Conference on Geographic Information Science, Limassol; 2019-06-17 -- 2019-06-20},
keywords = {Classification, Inertial Measurement Unit, Motorcycle, Navigation, Routing},
pubstate = {published},
tppubtype = {inproceedings}
}
A basic problem in navigation is the selection of a suitable route. This requires a determination of costs or suitability. There are approaches for many standard situations, e.g., the shortest route for pedestrians, the fastest route for cars, a physically possible and legal route for trucks, or the safest route for bicycle riders. However, not much research has been done yet for motorcycle riders. Published approaches rely on interpretation of geometry, interviews, or user feedback. None of these approaches is precise and scalable. Since modern motorcycles have an increasing number of internal sensors (e.g., lean angle sensors for curve ABS), they could provide the data required for a classification of route segments. The combination with a navigational device allows to georeferenced the data and thus attach riding characteristics to a specific road segment. This work sketches the classification concept and presents data from a real-driving experiment using an external IMU.
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Jilin, Dimitri; Navratil, Gerhard; Clementini, Eliseo; Fogliaroni, Paolo
OpenStreetMap als kommunale Kartengrundlage Inproceedings
In: Strobl, Josef; Zagel, Bernhard; Griesebner, Gerald; Blaschke, Thomas (Ed.): AGIT – Journal für Angewandte Geoinformatik, pp. 236–245, Wichmann Verlag, VDE Verlag GMBH, 2019, ISBN: 978-3-87907-669-7, (Vortrag: AGIT 2019, Salzburg; 2019-07-03 — 2019-07-05).
@inproceedings{jilin19:236[TUW-281623],
title = {OpenStreetMap als kommunale Kartengrundlage},
author = {Dimitri Jilin and Gerhard Navratil and Eliseo Clementini and Paolo Fogliaroni},
editor = {Josef Strobl and Bernhard Zagel and Gerald Griesebner and Thomas Blaschke},
doi = {10.14627/537669022},
isbn = {978-3-87907-669-7},
year = {2019},
date = {2019-01-01},
booktitle = {AGIT - Journal für Angewandte Geoinformatik},
pages = {236--245},
publisher = {Wichmann Verlag, VDE Verlag GMBH},
abstract = {Die digitalen Stadtpläne vieler Städte sind ungenau bzw. unvollständig. Ein Ansatz wäre es, mit freiwillig zur Verfügung gestellten geographischen Daten (VGI, Volunteered Geographic Information) Städte qualitativ hochwertig und dennoch günstig zu kartieren. Dieser Ansatz wurde in der Stadt L'Aquila in Italien erprobt. Als Kartierungsplattform wurde OpenStreetMap (OSM) gewählt. Es bezieht seine Stärke aus der Zusammenarbeit von tausenden freiwilligen Kontributoren. Zugleich liegt hier auch seine größte Schwäche. Im Gegensatz zu zentral gelenkten Kartenwerken besitzt OSM kein korrigierendes Organ für inkonsistente Darstellungen von gleichartigen Details. Dieses Signaturenproblem und ein Ansatz für eine mögliche Lösung wird gezeigt und diskutiert.},
note = {Vortrag: AGIT 2019, Salzburg; 2019-07-03 -- 2019-07-05},
keywords = {Datenerfassung, Kartographie, OSM, VGI},
pubstate = {published},
tppubtype = {inproceedings}
}
Die digitalen Stadtpläne vieler Städte sind ungenau bzw. unvollständig. Ein Ansatz wäre es, mit freiwillig zur Verfügung gestellten geographischen Daten (VGI, Volunteered Geographic Information) Städte qualitativ hochwertig und dennoch günstig zu kartieren. Dieser Ansatz wurde in der Stadt L’Aquila in Italien erprobt. Als Kartierungsplattform wurde OpenStreetMap (OSM) gewählt. Es bezieht seine Stärke aus der Zusammenarbeit von tausenden freiwilligen Kontributoren. Zugleich liegt hier auch seine größte Schwäche. Im Gegensatz zu zentral gelenkten Kartenwerken besitzt OSM kein korrigierendes Organ für inkonsistente Darstellungen von gleichartigen Details. Dieses Signaturenproblem und ein Ansatz für eine mögliche Lösung wird gezeigt und diskutiert.
|
|
Fogliaroni, Paolo; Mazurkiewicz, Bartosz; Kattenbeck, Markus; Giannopoulos, Ioannis
Geographic-Aware Augmented Reality for VGI Inproceedings
In: Gartner, Georg; Huang, Haosheng (Ed.): Advances in Cartography and GIScience of the ICA (ICA-Adv), pp. 3.1–3.9, International Cartographic Association (ICA), 2, 2019, (Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 — 2019-11-13).
@inproceedings{fogliaroni19:3.1[TUW-282611],
title = {Geographic-Aware Augmented Reality for VGI},
author = {Paolo Fogliaroni and Bartosz Mazurkiewicz and Markus Kattenbeck and Ioannis Giannopoulos},
editor = {Georg Gartner and Haosheng Huang},
doi = {10.5194/ica-adv-2-3-2019},
year = {2019},
date = {2019-01-01},
booktitle = {Advances in Cartography and GIScience of the ICA (ICA-Adv)},
pages = {3.1--3.9},
publisher = {International Cartographic Association (ICA)},
address = {2},
abstract = {Volunteered Geographic Information (VGI) has been a constantly growing field over the last decade, but the utilised technologies (i.e., mobile phones) are not able to exploit the full potential concerning effort and accuracy of registering geographic data. This paper introduces the GeoAR Glasses, a novel technology enabling the use of Geographic-Aware Augmented Reality for Mobile Geographic Information Systems (Mobile GIS) and Location-Based Services (LBS). The potentials of the GeoAR Glasses with respect to current mobile mapping applications is shown by means of an in-situ study (N=42) comparing two different modes of collecting VGI data. For the comparison we take into account the accuracy of the mapped data points and the time needed to complete the mapping. The results show that the GeoAR Glasses outperform the mobile application concerning both positional accuracy and completion time.},
note = {Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 -- 2019-11-13},
keywords = {augmented reality, geoAR, in-situ study, Volunteered Geographic Information},
pubstate = {published},
tppubtype = {inproceedings}
}
Volunteered Geographic Information (VGI) has been a constantly growing field over the last decade, but the utilised technologies (i.e., mobile phones) are not able to exploit the full potential concerning effort and accuracy of registering geographic data. This paper introduces the GeoAR Glasses, a novel technology enabling the use of Geographic-Aware Augmented Reality for Mobile Geographic Information Systems (Mobile GIS) and Location-Based Services (LBS). The potentials of the GeoAR Glasses with respect to current mobile mapping applications is shown by means of an in-situ study (N=42) comparing two different modes of collecting VGI data. For the comparison we take into account the accuracy of the mapped data points and the time needed to complete the mapping. The results show that the GeoAR Glasses outperform the mobile application concerning both positional accuracy and completion time.
|
|
Gokl, Lukas; McCutchan, Marvin; Mazurkiewicz, Bartosz; Fogliaroni, Paolo; Giannopoulos, Ioannis
Towards Urban Environment Familiarity Prediction Inproceedings
In: Gartner, Georg; Huang, Haosheng (Ed.): Advances in Cartography and GIScience of the ICA (ICA-Adv), pp. 5-1–5-8, International Cartographic Association (ICA), 2, 2019, (Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 — 2019-11-13).
@inproceedings{gokl19:5-1[TUW-282604],
title = {Towards Urban Environment Familiarity Prediction},
author = {Lukas Gokl and Marvin McCutchan and Bartosz Mazurkiewicz and Paolo Fogliaroni and Ioannis Giannopoulos},
editor = {Georg Gartner and Haosheng Huang},
doi = {10.5194/ica-adv-2-5-2019},
year = {2019},
date = {2019-01-01},
booktitle = {Advances in Cartography and GIScience of the ICA (ICA-Adv)},
pages = {5-1--5-8},
publisher = {International Cartographic Association (ICA)},
address = {2},
abstract = {Location Based Services (LBS) are definitely very helpful for people that interact within an unfamiliar environment, but also for those that already possess a certain level of familiarity with it. In order to avoid overwhelming familiar users with unnecessary information, the level of details offered by the LBS shall be adapted to the level of familiarity with the environment: providing more details to unfamiliar users and a lighter amount of information (that would be superfluous, if not even misleading) to the users that are more familiar with the current environment. Currently, the information exchange between the service and its users is not taking into account familiarity. Within this work, we investigate the potential of machine learning for a binary classification of environment familiarity (i.e., familiar vs unfamiliar) with the surrounding environment. For this purpose, a 3D virtual environment based on a part of Vienna, Austria was designed using datasets from the municipal government. During a navigation experiment with 22 participants we collected ground truth data in order to train four machine learning algorithms. The captured data included motion and orientation of the users as well as visual interaction with the surrounding buildings during navigation. This work demonstrates the potential of machine learning for predicting the state of familiarity as an enabling step for the implementation of LBS better tailored to the user.},
note = {Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 -- 2019-11-13},
keywords = {environment familiarity, Machine Learning, virtual environment},
pubstate = {published},
tppubtype = {inproceedings}
}
Location Based Services (LBS) are definitely very helpful for people that interact within an unfamiliar environment, but also for those that already possess a certain level of familiarity with it. In order to avoid overwhelming familiar users with unnecessary information, the level of details offered by the LBS shall be adapted to the level of familiarity with the environment: providing more details to unfamiliar users and a lighter amount of information (that would be superfluous, if not even misleading) to the users that are more familiar with the current environment. Currently, the information exchange between the service and its users is not taking into account familiarity. Within this work, we investigate the potential of machine learning for a binary classification of environment familiarity (i.e., familiar vs unfamiliar) with the surrounding environment. For this purpose, a 3D virtual environment based on a part of Vienna, Austria was designed using datasets from the municipal government. During a navigation experiment with 22 participants we collected ground truth data in order to train four machine learning algorithms. The captured data included motion and orientation of the users as well as visual interaction with the surrounding buildings during navigation. This work demonstrates the potential of machine learning for predicting the state of familiarity as an enabling step for the implementation of LBS better tailored to the user.
|
|
Navratil, Gerhard; Schmitzer, Manuel; Giannopoulos, Ioannis
Location Based Services for Human Self-Localization Inproceedings
In: Gartner, Georg; Huang, Haosheng (Ed.): Advances in Cartography and GIScience of the ICA (ICA-Adv), pp. 11.1–11.8, International Cartographic Association (ICA), 2, 2019, (Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 — 2019-11-13).
@inproceedings{navratil19:11.1[TUW-282608],
title = {Location Based Services for Human Self-Localization},
author = {Gerhard Navratil and Manuel Schmitzer and Ioannis Giannopoulos},
editor = {Georg Gartner and Haosheng Huang},
doi = {10.5194/ica-adv-2-11-2019},
year = {2019},
date = {2019-01-01},
booktitle = {Advances in Cartography and GIScience of the ICA (ICA-Adv)},
pages = {11.1--11.8},
publisher = {International Cartographic Association (ICA)},
address = {2},
abstract = {Human self-localisation is an important part of everyday life. In order to determine one's own position and orientation, the allocentric representation, usually in the form of a map, has to be aligned with one's own egocentric representation of the real world. This requires objects (anchor points) that are present in both representations. We present two novel approaches that aim to simplify the process of alignment and thus the self-localisation. The Viewshed approach is based on visibility analysis and the Image Recognition approach identifies objects and highlights them on the map. On the basis of an empirical experiment with 30 participants in the city of Vienna, Austria, the two approaches were compared with each other as well as with a standard approach using a 2D map representation. The goal is to assess and compare aspects like efficiency, user experience, and cognitive workload. Results show that the Image Recognition method provided the best support and was also most popular among users. The Viewshed method performed well below expectations.},
note = {Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 -- 2019-11-13},
keywords = {image recognition, self-localization, user tests, viewshed},
pubstate = {published},
tppubtype = {inproceedings}
}
Human self-localisation is an important part of everyday life. In order to determine one’s own position and orientation, the allocentric representation, usually in the form of a map, has to be aligned with one’s own egocentric representation of the real world. This requires objects (anchor points) that are present in both representations. We present two novel approaches that aim to simplify the process of alignment and thus the self-localisation. The Viewshed approach is based on visibility analysis and the Image Recognition approach identifies objects and highlights them on the map. On the basis of an empirical experiment with 30 participants in the city of Vienna, Austria, the two approaches were compared with each other as well as with a standard approach using a 2D map representation. The goal is to assess and compare aspects like efficiency, user experience, and cognitive workload. Results show that the Image Recognition method provided the best support and was also most popular among users. The Viewshed method performed well below expectations.
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2018
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Aschauer, Rudolf
Qualität als Schlüssel zur Rechtsrelevanz bei der Übernahme von Geodaten PhD Thesis
ŦU Graz, Institut für Geodäsie, 2018.
@phdthesis{TUW-269803,
title = {Qualität als Schlüssel zur Rechtsrelevanz bei der Übernahme von Geodaten},
author = {Rudolf Aschauer},
year = {2018},
date = {2018-01-01},
urldate = {2018-01-01},
school = {ŦU Graz, Institut für Geodäsie},
abstract = {A large number of civil engineers or departments work on geospatial data infrastructures with legal contexts, which are published in web services. Each planner covers only a small sub-area and the geodata are brought together by a central office. However, these digital maps are of no legal relevance due to a lack of quality. This paper describes action plans that ensure that the geodata correctly represent the legal situation. The overwhelming majority of mistakes can be eliminated by software. Autonomous definitions of planners are beyond the control of rules or other databases, thus changes in the organization and the legal framework are necessary to guarantee correct data. A particular challenge in this project is the technical implementation, which is why the quality models of geoinformatics were interwoven with the quality models of software engineering.},
keywords = {Flächenwidmungsplan, Kirrektheit, Qualität, Software engineering},
pubstate = {published},
tppubtype = {phdthesis}
}
A large number of civil engineers or departments work on geospatial data infrastructures with legal contexts, which are published in web services. Each planner covers only a small sub-area and the geodata are brought together by a central office. However, these digital maps are of no legal relevance due to a lack of quality. This paper describes action plans that ensure that the geodata correctly represent the legal situation. The overwhelming majority of mistakes can be eliminated by software. Autonomous definitions of planners are beyond the control of rules or other databases, thus changes in the organization and the legal framework are necessary to guarantee correct data. A particular challenge in this project is the technical implementation, which is why the quality models of geoinformatics were interwoven with the quality models of software engineering.
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Kmen, Christopher
Use of Pictures from Social Media to Assess the Local Attractivity as an Indicator for Real Estate Value Assessment Masters Thesis
Department for Geodesy and Geoinformation, FB Geoinformation, 2018.
@mastersthesis{TUW-268467,
title = {Use of Pictures from Social Media to Assess the Local Attractivity as an Indicator for Real Estate Value Assessment},
author = {Christopher Kmen},
url = {http://publik.tuwien.ac.at/files/publik_268467.pdf},
year = {2018},
date = {2018-01-01},
urldate = {2018-01-01},
school = {Department for Geodesy and Geoinformation, FB Geoinformation},
abstract = {In recent years there has been a massive increase in the production and collection of data (Goodchild 2007). Especially in the field of social media an overflowing quantity of pictures is produced. Therefore, the question is raised, if spatial models could be derived from these images. Or, in other words, is it possible to use social media data for spatial and/or semantic purposes?
In recent studies by Hochmair (2009) and Alivand (2013) it was found that people tend to make more pictures in places which appear more attractive than in those which seem less appealing. Other Studies (Brunauer et al. 2013) and (Helbich et al. 2013) come to the conclusion that those areas that appear more appealing have higher real estate prices.
This study will link all these components together. Images are collected from social media and classified based in their focus - social interaction or documentation of the surrounding. Images in the later case will be used for further analysis. A neural network will be used for classification. As area for the study Vienna is chosen.
In the next step another big amount of social media images with geo location features is gathered and filtered with the newly trained neural network. Then the location information of the valid images is stored. Out of these data a heat map is created, with the density of the images taken as indicator.
For the validation of the created model the company DataScience Service GmbH compares the heat map with their real estate price model to see if there is a link between social media output and real estate prices.},
keywords = {Pictures, Property, social media, TEnsor Flow, Value},
pubstate = {published},
tppubtype = {mastersthesis}
}
In recent years there has been a massive increase in the production and collection of data (Goodchild 2007). Especially in the field of social media an overflowing quantity of pictures is produced. Therefore, the question is raised, if spatial models could be derived from these images. Or, in other words, is it possible to use social media data for spatial and/or semantic purposes?
In recent studies by Hochmair (2009) and Alivand (2013) it was found that people tend to make more pictures in places which appear more attractive than in those which seem less appealing. Other Studies (Brunauer et al. 2013) and (Helbich et al. 2013) come to the conclusion that those areas that appear more appealing have higher real estate prices.
This study will link all these components together. Images are collected from social media and classified based in their focus – social interaction or documentation of the surrounding. Images in the later case will be used for further analysis. A neural network will be used for classification. As area for the study Vienna is chosen.
In the next step another big amount of social media images with geo location features is gathered and filtered with the newly trained neural network. Then the location information of the valid images is stored. Out of these data a heat map is created, with the density of the images taken as indicator.
For the validation of the created model the company DataScience Service GmbH compares the heat map with their real estate price model to see if there is a link between social media output and real estate prices.
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Fogliaroni, Paolo; Ballatore, Andrea; Clementini, Eliseo
Proceedings of Workshops and Posters at the 13th International Conference on Spatial Information Theory (COSIT 2017) Book
Springer Verlag, 2018, ISBN: 978-3-319-63945-1.
@book{fogliaroni18[TUW-268861],
title = {Proceedings of Workshops and Posters at the 13th International Conference on Spatial Information Theory (COSIT 2017)},
author = {Paolo Fogliaroni and Andrea Ballatore and Eliseo Clementini},
editor = {William Cartwright and Georg Gartner and Liqiu Meng and Michael P Peterson},
doi = {10.1007/978-3-319-63946-8},
isbn = {978-3-319-63945-1},
year = {2018},
date = {2018-01-01},
publisher = {Springer Verlag},
series = {Lecture Notes in Geoinformation and Cartography},
keywords = {},
pubstate = {published},
tppubtype = {book}
}
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