Full Conference Program

Presenters info

Full papers: 15 minutes

Short papers: 10 minutes

Discussion at the end of each session: 20 minutes

Program at a glance

All times are shown in the Central European Summer Time - CET (UTC + 02:00) time zone.

The conference will take place in the GIScience2021: conference room.

Program at a glance
time Monday 27.09 Tuesday 28.09 Wednesday 29.09 Thursday 30.09
8:00-8:30 -- Introduction and Conference Overview -- --
8:30-9:30 -- Keynote 1 – Prof. Simon Scheider Session 7 - WAYFINDING & NAVIGATION Session 13 - APPLICATIONS
9:30-9:45 -- Break Break Break
9:45-10:45 -- Session 1 - COMPUTATIONAL GEOMETRY Session 8 - SPATIAL ANALYTICS Panel on Responsible Collection and Analysis of Spatial Data
10:45-11:00 -- Break Break Break
12:00-13:15 -- Lunch Break Lunch Break Lunch Break
13:15-14:15 Workshops and Thematic Seminar 9:00-17:00 Session 3 - MOBILITY Session 10 - GRAPHS Session 15 - URBAN STUDIES
14:15-14:30 -- Break Break Break
14:30-15:30 -- Session 4 - SEARCH AND PLACE Session 11 - WAYFINDING & NAVIGATION Session 16 - MOBILITY
15:30-15:45 -- Break Break Break
15:45-16:45 -- Session 5 - PEOPLE AND PLACES Session 12 - PRIVACY and ANONYMITY Session 17 - MOBILE MEASUREMENTS
16:45-17:00 -- Break Break Break
17:00-18:05 -- Session 6 - GEOAI and LEARNING Keynote 2 – Prof. Katy Boerner Session 18 - STATUS OF GISCIENCE
18:05-18:30 -- -- -- CLOSING SESSION
18:30-19:30 Welcome and Opening Lecture -- -- --

Welcome and Opening Lecture

Opening Lecture is available at https://youtu.be/yj1u_mwV9L8.

More about Poznan’s region history


Keynote 1

Chair: Krzysztof Janowicz

8:30-9:15: Prof. Simon Scheider. If GIS provides the answer, what was the question again? Geo-analytical question-answering as a form of knowledge generation

9:15-9:30: Discussion


Chair: Robert Weibel

9:45-10:00: Marc van Kreveld, Tim Ophelders, Willem Sonke, Bettina Speckmann, and Kevin Verbeek. Volume from Outlines on Terrains (Candidate for Best-Paper Award)

10:00-10:15: Ankush Acharyya, Ramesh Jallu, Maarten Löffler, Gert Meijer, Maria Saumell, Rodrigo Silveira and Frank Staals. Terrain prickliness: theoretical grounds for high complexity viewsheds

10:15-10:25: Mateusz Ośko, Jarosław Jasiewicz and Przemysław Szarwark. Segmentation of point-based geographic space

10:25-10:45: Discussion


Chair: Jan-Henrik Haunert

11:00-11:15: Arthur van Goethem, Wouter Meulemans, Andreas Reimer and Bettina Speckmann. Harmonious Simplification of Isolines

11:15-11:30: Ahmad Qutbuddin and KwangSoo Yang. Multiple Resource Network Voronoi Diagram

11:30-11:40: Jakub Nowosad and Tomasz Stepinski. Generalizing the Simple Linear Iterative Clustering (SLIC) superpixels

11:40-12:00: Discussion

Session 3 - MOBILITY

Chair: Martin Raubal

13:15-13:30: Bram Custers, Wouter Meulemans, Bettina Speckmann and Kevin Verbeek. Coordinated Schematization for Visualizing Mobility Patterns on Networks (Candidate for Best-Paper Award)

13:30-13:45: Christina Ludwig, Sven Lautenbach, Eva-Marie Schömann and Alexander Zipf. Comparison of simulated fast and green routes for cyclists and pedestrians

13:45-13:55: Nick Malleson, Hang Nguyen Thi Thuy, Thanh Bui Quang, Minh Kieu, Phe Hoang Huu and Alexis Comber. Urban Data Science for Sustainable Transport Policies in Emerging Economies

13:55-14:15: Discussion


Chair: Clodoveu Davis

14:30-14:40: Mohammad Kazemi Beydokhti, Matt Duckham, Amy Griffin and Vedran Kasalica. Geo-Event Question Answering Systems: A Preliminary Research Study

14:40-14:55: René Unrau and Christian Kray. Enhancing Usability Evaluation of web-based Geographic Information Systems (WebGIS) with Visual Analytics

14:55-15:10: Thomas Hervey, Sara Lafia, and Werner Kuhn. Search Facets and Ranking in Geospatial Dataset Search

15:10-15:30: Discussion


Chair: Shirly Stephen

15:45-15:55: Anna Dmowska, Tomasz Stepinski and Jakub Nowosad. A pattern-based approach to analysis and visualization of spatio-racial distribution

15:55-16:05: Tomasz Stepinski and Anna Dmowska. Spatially-explicit forecasting of racial change

16:05-16:15: Joseph Tuccillo. An Individual-Centered Approach for Geodemographic Classification

16:15-16:25: Gautam Thakur and Junchuan Fan. MapSpace: POI-based Multi-Scale Global Land Use Modeling

16:25-16:45: Discussion

Session 6 - GEOAI and LEARNING

Chair: Yingjie Hu

17:00-17:15: Xueqing Deng, Yuxin Tian, and Shawn Newsam. Generalizing Deep Models for Overhead Image Segmentation Through Getis-Ord Gi* Pooling

17:15-17:25: Stephen Law, Peter Jeszenszky and Keiji Yano. Examining geographical generalisation of machine learning models in urban analytics through street frontage classification and house price regression

17:25-17:35: Jin Xing and Renee Sieber. Integrating XAI and GeoAI

17:35-17:45: Xuke Hu, Zhiyong Zhou, Kersten Jens, Matti Wiegmann and Friederike Klan. GazPNE2: A general and annotation-free place name extractor for microblogs fusing gazetteers and transformer models

17:45-18:05: Discussion


Chair: Sabine Timpf

8:30-8:45: Bartosz Mazurkiewicz, Markus Kattenbeck and Ioannis Giannopoulos. Navigating Your Way! Increasing the Freedom of Choice during Wayfinding

8:45-9:00: Isabella Kreller and Bernd Ludwig. User Preferences and the Shortest Path

9:00-9:10: Armand Kapaj, Sara Lanini-Maggi and Sara I. Fabrikant. The influence of landmark visualization style on expert wayfinders’ visual attention during a real-world navigation task

9:10-9:30: Discussion


Chair: Jakub Nowosad

9:45-9:55: Takahiro Yoshida, Daisuke Murakami, Hajime Seya, Narumasa Tsutsumida and Tomoki Nakaya. Geographically weighted regression for compositional data: An application to the U.S. household income compositions

9:55-10:05: Alexis Comber, Nick Malleson, Hang Nguyen Thi Thuy, Thanh Bui Quang, Minh Kieu, Hoang Huu Phe and Paul Harris. Multiscale Geographically Weighted Discriminant Analysis

10:05-10:15: Daisuke Murakami, Narumasa Tsutsumida, Takahiro Yoshida, Tomoki Nakaya, Binbin Lu and Paul Harris. Stable geographically weighted Poisson regression for count data

10:15-10:25: Zhan Peng and Ryo Inoue. Specifying multi-scale spatial heterogeneity in the rental housing market: The case of the Tokyo metropolitan area

10:25-10:45: Discussion


Chair: Anita Graser

11:00-11:15: Timon Behr, Thomas C. van Dijk, Axel Forsch, Jan-Henrik Haunert and Sabine Storandt. Map Matching for Semi-Restricted Trajectories

11:15-11:25: Satabdi Das, Sharmin Ahmed, Summit Haque and Sabir Ismail. Assessing Correlation Between Night-Time Light and Road Infrastructure: An Empirical Study

11:25-11:35: Vincent Franke and Sabine Timpf. Agent-based Line-of-Sight Simulation for safer Crossings

11:35-11:55: Discussion

Session 10 - GRAPHS

Chair: Simon Scheider

13:15-13:30: Peter Rottmann, Anne Driemel, Herman Haverkort, Heiko Röglin and Jan-Henrik Haunert. Bicriteria Aggregation of Polygons via Graph Cuts

13:30-13:45: Sameera Kannangara, Hairuo Xie, Egemen Tanin, Aaron Harwood, and Shanika Karunasekera. Introducing Diversion Graph for Real-Time Spatial Data Analysis with Location Based Social Networks

13:45-13:55: Cheng Fu, Mirco Nanni, Gevorg Yeghikyan and Robert Weibel. Measuring Polycentricity: A Whole Graph Embedding Perspective

13:55-14:15: Discussion


Chair: Ioannis Giannopoulos

14:30-14:45: Arun Sharma, Xun Tang, Jayant Gupta, Majid Farhadloo, and Shashi Shekhar. Analyzing Trajectory Gaps for Possible Rendezvous: A Summary of Results

14:45-15:00: Fateme Teimouri and Kai-Florian Richter. You Are Not Alone: Path Search Models, Traffic, and Social Costs (Candidate for Best-Paper Award)

15:00-15:10: Sara Lanini-Maggi, Ian Tanner Ruginski and Sara Irina Fabrikant. Improving pedestrians’ spatial learning during landmark-based navigation with auditory emotional cues and narrative

15:10-15:30: Discussion

Session 12 - PRIVACY and ANONYMITY

Chair: Grant McKenzie

15:45-16:00: Fiona Polzin and Ourania Kounadi. Adaptive Voronoi Masking: A method to protect confidential discrete spatial data

16:00-16:15: Jinmeng Rao, Song Gao, Yuhao Kang, and Qunying Huang. LSTM-TrajGAN: A Deep Learning Approach to Trajectory Privacy Protection

16:15-16:25: Jan-Henrik Haunert, Daniel Schmidt and Melanie Schmidt. Anonymization via Clustering of Locations in Road Networks

16:25-16:45: Discussion

Keynote 2

Chair: Judith Verstegen

17:00-17:45: Prof. Katy Boerner. Mapping Scientific Data

17:45-18:00: Discussion


Chair: René Westerholt

8:30-8:45: Jamie Scott, Kristin Stock, Fraser Morgan, Brandon Whitehead and David Medyckyj-Scott. Automated Georeferencing of Antarctic Species

8:45-9:00: Sadegh Motallebi, Hairuo Xie, Egemen Tanin, and Kotagiri Ramamohanarao. Traffic Congestion Aware Route Assignment

9:00-9:10: Shahreen Muntaha Nawfee, Andrea Ballatore, Stefano De Sabbata and Nicholas Tate. Spatio-temporal variability in Wikipedia content: The case of Greater London

9:10-9:30: Discussion

Discussion panel

9:45-10:45: Responsible Collection and Analysis of Spatial Data


  • Ana Basiri - University of Glasgow
  • Grant McKenzie - McGill University
  • Dara Seidl - Colorado Mountain College
  • Matt Duckham - RMIT University


Chair: Sara I. Fabrikant

11:00-11:15: Ye Hong, Yanan Xin, Henry Martin, Dominik Bucher and Martin Raubal. A clustering-based framework for individual travel behaviour change detection

11:15-11:30: Negar Alinaghi, Markus Kattenbeck, Antonia Golab and Ioannis Giannopoulos. Will You Take this Turn? Gaze-Based Turning Activity Recognition During Navigation

11:30-11:40: Johannes Scholz and Christoph Url. Eco-friendly Routing based on real-time Air-quality Sensor Data from Vehicles

11:40-12:00: Discussion

Session 15 - URBAN STUDIES

Chair: Anna Dmowska

13:15-13:30: Bartosz Mazurkiewicz, Markus Kattenbeck, Peter Kiefer, and Ioannis Giannopoulos. Not Arbitrary, Systematic! Average-Based Route Selection for Navigation Experiments

13:30-13:40: Zhiyong Zhou, Robert Weibel and Haosheng Huang. Varying salience in indoor landmark selection for familiar and unfamiliar wayfinders: evidence from machine learning and self-reports

13:40-13:55: Jaehee Park, Hao Zhang, Su Yeon Han, Atsushi Nara, and Ming-Hsiang Tsou. Estimating Hourly Population Distribution Patterns at High Spatiotemporal Resolution in Urban Areas Using Geo-Tagged Tweets and Dasymetric Mapping

13:55-14:15: Discussion

Session 16 - MOBILITY

Chair: Johannes Scholz

14:30-14:40: Gregor Donabauer and Bernd Ludwig. Testing Landmark Salience Prediction in Indoor Environments Based on Visual Information

14:40-14:50: Gereon Kaiping. A network for simulating pre-colonial migration in the Americas

14:50-15:00: Eduard Rech and Sabine Timpf. Simulating changing traffic flow caused by new bus route in Augsburg

15:00-15:10: Evgeny Noi, Somayeh Dodge and Alexander Rudolph. A novel method for mapping spatiotemporal structure of mobility patterns during the COVID-19 pandemic

15:10-15:30: Discussion


Chair: Carlos Granell

15:45-16:00: Yingjie Hu and Jimin Wang. How Do People Describe Locations During a Natural Disaster: An Analysis of Tweets from Hurricane Harvey (Candidate for Best-Paper Award)

16:00-16:15: Dominik Bucher, Henry Martin, David Jonietz, Martin Raubal, and René Westerholt. Estimation of Moran’s I in the Context of Uncertain Mobile Sensor Measurements

16:15-16:25: Michael Sinclair, Qunshan Zhao, Nick Bailey, Saeed Maadi and Jinhyun Hong. Understanding the use of greenspace before and during the COVID-19 pandemic by using mobile phone app data

16:25-16:45: Discussion


Chair: Zbigniew Zwoliński

17:00-17:15: Frank Ostermann, Daniel Nüst, Carlos Granell, Barbara Hofer and Markus Konkol. Reproducible Research and GIScience: an evaluation using GIScience conference papers (Candidate for Best-Paper Award)

17:15-17:25: Marek Baranowski, Dariusz Gotlib, Jacek Kozak and Zbigniew Zwoliński. GIScience in Poland – Research, Education, Community

17:25-17:35: Amber Peek, Michael Martin and Sophie Kolston. The Virtual Reality of GIScience

17:35-17:45: Jan Oliver Wallgrün, Jiawei Huang, Jiayan Zhao, Benjamin Brede, Alvaro Lau and Alexander Klippel. Embodied digital twins of forest environments

17:45-18:05: Discussion