SIGSPATIAL 2026

The ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems 2026 (ACM SIGSPATIAL 2026), the thirty-fourth edition, will be held in Riverside, CA, USA. The conference began as a series of symposia and workshops starting in 1993 with the aim of bringing together researchers, developers, users, and practitioners in relation to novel systems based on geospatial data and knowledge, and fostering interdisciplinary discussions and research in all aspects of geographic information systems. The conference provides a forum for original research contributions covering all conceptual, design, and implementation aspects of geospatial data ranging from applications, user interfaces, and visualization to data storage and query processing and indexing. The conference is the premier annual event of the ACM Special Interest Group on Spatial Information (ACM SIGSPATIAL). Researchers, students, and practitioners are invited to submit their contributions to ACM SIGSPATIAL 2026.

Important Dates

Abstract Submission: Friday, May 29th, 2026, 11:59 PM Pacific Time
Paper Submission: Friday, June 5th, 2026, 11:59 PM Pacific Time
Notification of Accept/Reject: Wednesday, Aug 5th, 2026, 11:59 PM Pacific Time
Camera-ready: Wednesday, August 19th, 2026, 11:59 PM Pacific Time

Click Here: Visit the SIGSPATIAL 2026 website

SIGSPATIAL Special Newsletter – July 2025 (Vol. 15, No. 1)

Click here to download the PDF file: Volume 15, Number 1, July 2025

The SIGSPATIAL Special (Volume 15, Number 1, July 2025) marks an important return after a two-year publication pause. This issue brings the community back together with a comprehensive set of workshop reports from ACM SIGSPATIAL 2024, a message from the editors, and announcements about new initiatives for ACM SIGSPATIAL 2025. The newsletter highlights the vibrant growth of the spatial computing community across GeoAI, geospatial simulation, spatial epidemiology, sustainable mobility, anomaly detection, and more.

Message from the Editors

Andrea Maldonado & Martin Werner
Technical University of Munich

Section 1: SIGSPATIAL 2024 Workshop Reports

➤ Report of the 7th ACM SIGSPATIAL International Workshop on AI for Geographic Knowledge Discovery (GeoAI 2024)

Song Gao, Gengchen Mai, Shawn Newsam, Lexie Yang, Dalton Lunga, Di Zhu, Bruno Martins, Samantha Arundel

➤ Urban-AI 2024 Workshop Report: The 2nd ACM SIGSPATIAL International Workshop on Advances in Urban-AI (Urban-AI 2024)

Olufemi A. Omitaomu, Ali Mostafavi, Sukanya Randhawa, Haoran Niu

➤ GeoAnomaly Detection: Towards Finding Needles of Anomalous Behavior in a Haystack of Geospatial Data (GeoAnomalies’24)

Yao-Yi Chiang, Joon-Seok Kim, Cory Krause, Enrico Mattei, Khurram Shafique, Carola Wenk, Andreas Züfle

➤ The 2nd ACM SIGSPATIAL Workshop on Sustainable Urban Mobility (SUMob’24)

Monika Sester, Stephan Winter, Latifa Oukhellou

➤ GeoSim 2024 Workshop Report — The 7th ACM SIGSPATIAL International Workshop on Geospatial Simulation (GeoSim’24)

Joon-Seok Kim, Andreas Züfle, Taylor Anderson, Ashwin Shashidharan

➤ SpatialEpi 2024 Workshop Report — The 5th ACM SIGSPATIAL International Workshop on Spatial Computing for Epidemiology (SpatialEpi’24)

Joon-Seok Kim, Andreas Züfle, Max Lau, Taylor Anderson, Amira Roess

Section 2: SIGSPATIAL 2025 Conference Announcements

➤ New Initiatives in ACM SIGSPATIAL 2025

Mohamed F. Mokbel, Shashi Shekhar, Andreas Züfle

Closing Thoughts

This July 2025 issue of The SIGSPATIAL Special captures a broad and energetic snapshot of the spatial computing field—from AI-driven geographic discovery and urban modeling to epidemiology, simulation, and new conference initiatives. As the community moves toward ACM SIGSPATIAL 2025 in Minneapolis, the newsletter provides both a retrospective on workshop achievements and a look ahead at exciting new tracks and opportunities.

You can explore the full details and articles here: Volume 15, Number 1, July 2025.

Link to SIGSPATIAL Special Newsletter: https://dl.acm.org/newsletter/sigspatial

SIGSPATIAL Special Newsletter November 2022 (Volume 14, Number 1): ACM SIGSPATIAL 2022

Volume 14, Number 1, November 202

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Forward and Table of Contents	i-iii
Section 1: ACM SIGSPATIAL 2022 Conference Report
The 30th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2022) Matthias Renz, Mohamed Sarwat, Mario A. Nascimento, Shashi Shekar, Xing Xie	2-6
Section 2: SIGPSPATIAL 2022 Workshop Reports
The 5th ACM SIGSPATIAL International Workshop on Advances in Resilient and Intelligent Cities (ARIC 2022) Bandana Kar, Shima Mohebbi, Guangtao Fu, Xinyue Ye, Olufemi A. Omitaomu	8-11
The 15th ACM SIGSPATIAL International Workshop on Computational Transportation Science (IWCTS 2022) Kuldeep Kurte, Andy Berres, Haowen Xu	12-18
The Sixth ACM SIGSPATIAL Workshop on Location-Based Recommendations, Geosocial Networks and Geoadvertising (LocalRec 2022) Panagiotis Bouros, Tamraparni Dasu, Yaron Kanza, Matthias Renz, Dimitris Sacharidis	19-22
The 5th ACM SIGSPATIAL International Workshop on AI for Geographic Knowledge Discovery (GeoAI 2022) Bruno Martins, Dalton Lunga, Song Gao, Shawn Newsam, Lexie Yang, Xueqing Deng, Gengchen Mai	23-25
The 6th ACM SIGSPATIAL International Workshop on Geospatial Humanities (GeoHumanities 2022) Ludovic Moncla, Bruno Martins, Katherine McDonough	26-27
The 3rd ACM SIGSPATIAL International Workshop on Spatial Computing for Epidemiology (SpatialEpi2022) Taylor Anderson, Joon-Seok Kim, Amira Roess, Andreas Züfle	28-31
The 2nd ACM SIGSPATIAL Workshop on Animal Movement Ecology and Human Mobility (HaniMob 2022) Federico Ossi, Fatima Hachem, Benjamin Robira, Diego Ellis-Soto, Christian Rutz, Somayeh Dodge, Francesca Cagnacci, Maria Luisa Damiani.	32-36
The 1st ACM SIGSPATIAL International Workshop on Geospatial Knowledge Graphs (GeoKG 2022) Rui Zhu, Krzysztof Janowicz, Gautam Thakur, Xiaogang Ma, Ellie Young, Gengchen Mai	37-39
The 5th ACM SIGSPATIAL International Workshop on Geospatial Simulation (GeoSim 2022) Joon-Seok Kim, Taylor Anderson, Ashwin Shashidharan, Alexander Hohl	40-42
The 10th ACM SIGSPATIAL International Workshop on Analytics for Big Spatial Data (BigSpatial 2022) Ashwin Shashidharan, Krishna Karthik Gadiraju, Ranga Raju Vatsavai, Varun Chandola	43-44
The 4th ACM SIGSPATIAL International Workshop on Spatial Gems (Spatial Gems 2022) John Krumm, Cyrus Shahabi, Andreas Züfle	45-47
Section 3: SIGPSPATIAL 2022 Additional Event Reports
The First Female Networking Event Jina Kim, Min Namgung	49-50
Extracting Building Footprints from LiDAR Point Clouds (GISCUP 2022) Cheryl Brooks, Serkan Isci, Yaron Kanza, James T. Klosowski, Robert Woods	51-55
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SIGSPATIAL Special Newsletter November 2021 (Volume 13, Number 3): ACM SIGSPATIAL 2021

Volume 13, Number 3, November 2021

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Forward and Table of Contents	i-iii
Section 1: SIGPSPATIAL 2021 Workshop Reports
The Fifth ACM SIGSPATIAL Workshop on Location-Based Recommendations, Geosocial Networks and Geoadvertising (LocalRec 2021) Panagiotis Bouros, Tamraparni Dasu, Yaron Kanza, Matthias Renz, Dimitris Sacharidis	1-5
The 4th ACM SIGSPATIAL International Workshop on Geospatial Simulation (GeoSim 2021) Joon-Seok Kim, Taylor Anderson, Ashwin Shashidharan, Jeon-Young Kang	6-8
GeoHumanities 2021 Ludovic Moncla, Carmen Brando, and Katherine McDonough	9-10
The 4th ACM SIGSPATIAL International Workshop on Advances in Resilient and Intelligent Cities (ARIC 2021) Bandana Kar, Shima Mohebbi, Guangtao Fu, Xinyue Ye, Olufemi A. Omitaomu	11-14
The 14th ACM SIGSPATIAL International Workshop on Computational Transportation Science (IWCTS 2021) Andy Berres, Kuldeep Kurte, Rajesh Paleti	15-20
The New Frontier of Geospatial Artificial Intelligence Research (GeoAI) Dalton Lunga, Yingjie Hu, Shawn Newsam, Song Gao, Bruno Martins, Lexie Yang, Xueqing Deng	21-32
The 1st ACM SIGSPATIAL Workshop on Animal Movement Ecology and Human Mobility (HaniMob 2021) Federico Ossi, Fatima Hachem, Francesca Cagnacci, Urška Demšar, Maria Luisa Damiani	33-36
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SIGSPATIAL Special Newsletter November 2020 (Volume 12, Number 3): ACM SIGSPATIAL 2020

Volume 12, Number 3, November 2020

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Forward and Table of Contents	i-iii
Introduction to this Special Issue Andreas Züfle	1-2
Section 1: ACM SIGSPATIAL 2020 Conference Report
The 28th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2020) Chang-Tien Lu, Fusheng Wang, Goce Trajcevski, Yan Huang, Shawn Newsam, Li Xiong	3-6
Section 2: SIGPSPATIAL 2020 Workshop Reports
The 4th ACM SIGSPATIAL Workshop on Location-Based Recommendations, Geosocial Networks, and Geoadvertising (LocalRec 2020) Panagiotis Bouros, Tamraparni Dasu, Yaron Kanza, Matthias Renz, Dimitris Sacharidis	7-10
The 3rd ACM SIGSPATIAL International Workshop on GeoSpatial Simulation (GeoSim 2020) Joon-Seok Kim, Taylor Anderson, Ashwin Shashidharan, Andreas Züfle	11-14
The 9th ACM SIGSPATIAL International Workshop on Analytics for Big Geospatial Data (BIGSPATIAL 2020) Ashwin Shashidharan, Varun Chandola, Ranga Raju Vatsavai	15-16
The 4th ACM SIGSPATIAL Workshop on Geospatial Humanities (GeoHumanities 2020) Ludovic Moncla, Patricia Murrieta-Flores, Carmen Brando	17-19
The 2nd ACM SIGSPATIAL International Workshop on Geospatial Data Access and Processing APIs (SpatialAPI 2020) Ahmed Eldawy, Gobe Hobona	20-22
The 3rd ACM SIGSPATIAL Workshop on Advances in Resilient and Intelligent Cities (ARIC 2020) Bandana Kar, Olufemi A. Omitaomu, Xinyue Ye, Shima Mohebbi, Guangtao Fu	23-25
13th International Workshop on Computational Transportation Science (IWCTS 2020) Kuldeep Kurte, Anne Berres, Srinath Ravulaparthy, Jibonananda Sanyal, Gautam Thakur	26-31
2nd ACM SIGSPATIAL International Workshop on Spatial Gems (SpatialGems 2020) John Krumm, Cyrus Shahabi, Andreas Züfle	32-34
The 1st ACM SIGSPATIAL International Workshop on Modeling and Understanding the Spread of COVID-19 Taylor Anderson, Jia Yu, Andreas Züfle	35-40
The 6th ACM SIGSPATIAL International Workshop Emergency Management using GIS (EM-GIS 2020) Yan Huan, Jean-Claude Thill, Hui Zhang, Bin Chen, Wei Xu	41-42
The 5th ACM SIGSPATIAL International Workshop Emergency Management using GIS (EM-GIS 2019) Hui Zhang, Yan Huang, Jean-Claude Thill, Danhuai Guo, Yi Liu, Bin Chen, Wei Xu	43-45
Section 3: ACM SIGSPATIAL 2020 Students Research Competition: Grand Finalists
Efficient Downscaling of Satellite Oceanographic Data With Convolutional Neural Networks Nikita Saxena	46-47
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SIGSPATIAL Special Newsletter July 2020 (Volume 12, Number 2): Modeling and Understanding the Spread of COVID-19 (Part 2)

Volume 12, Number 2, July 2020

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Foreword	i-iii
Introduction to this Special Issue: Modeling and Understanding the Spread of COVID-19 (Part II) Andreas Züfle, Taylor Anderson	1-2
Section 1: Modeling and Understanding the Spread of COVID-19
REACT: Real-Time Contact Tracing and Risk Monitoring using Privacy-Enhanced Mobile Tracking Li Xiong, Cyrus Shahabi, Yanan Da, Ritesh Ahuja, Vicki Hertzberg, Lance Waller, Xiaoqian Jiang, Amy Franklin	3-14
Contact Tracing: Beyond the Apps Mohamed Mokbel, Sofiane Abbar, Rade Stanojevic	15-24
Geospatial forecasting of COVID-19 spread and risk of reaching hospital capacity Georgiy Bobashev, Ignacio Segovia-Dominguez, Yulia R. Gel, James Rineer, Sarah Rhea, Hui Sui	25-32
COVID-19 Ensemble Models Using Representative Clustering Joon-Seok Kim, Hamdi Kavak, Andreas Züfle, Taylor Anderson	33-41
Section 2: Spatial Data Systems for the Internet of Things
Spatial Data Systems Support for the Internet of Things – Challenges and Opportunities Mohamed Sarwat	42-47
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SIGSPATIAL Special Newsletter March 2020 (Volume 12, Number 1): Modeling and Understanding the Spread of COVID-19 (Part 1)

Volume 12, Number 1, March 2020

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Foreword	i-iii
Introduction to this Special Issue: Modeling and Understanding the Spread of COVID-19 (Part I) Andreas Züfle	1-2
Section 1: Event Reports
The 27th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2019) Chicago, Illinois, USA, November 5-8, 2019 Ralf Hartmut Güting, Lars Kulik, Shawn Newsam, Farnoush Banaei-Kashani, Goce Trajcevski	3-5
Section 2: Modeling and Understanding the Spread of COVID-19
GeoCoV19: A Dataset of Hundreds of Millions of Multilingual COVID-19 Tweets with Location Information Umair Qazi, Muhammad Imran, Ferda Ofli	6-15
Mapping county-level mobility pattern changes in the United States in response to COVID-19 Song Gao, Jinmeng Rao, Yuhao Kang, Yunlei Liang, Jake Kruse	16-26
Rapid detection of COVID-19 clusters in the United States using a prospective space-time scan statistic: An update Alexander Hohl, Eric Delmelle, Michael Desjardins	27-33
Human Mobility based Individual-level Epidemic Simulation Platform Zipei Fan, Xuan Song, Yinghao Liu, Zhiwen Zhang, Chuang Yang, Quanjun Chen, Renhe Jiang, Ryosuke Shibasaki	34-40
Section 3: Microblog and Location-Based Social Network Data
Microblogs: A Renewable Spatio-temporal Fortune Amr Magdy	41-52
Location-Based Social Simulation for Prescriptive Analytics of Disease Spread Joon-Seok Kim, Hamdi Kavak, Chris Ovi Rouly, Hyunjee Jin, Andrew Crooks, Dieter Pfoser, Carola Wenk, Andreas Züfle	53-61
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SIGSPATIAL Special Newsletter November 2019 (Volume 11, Number 3): ACM SIGSPATIAL 2019 Student Research Competition

Volume 11, Number 3, November 2019

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Foreword	i-iii
Message from the Editor Andreas Züfle	1-2
Section 1: The 4th ACM SIGSPATIAL Student Research Competition (SRC) Grand Finalists
Flash: Scalable Spatial Probabilistic Graphical Modeling Ibrahim Sabek	3-6
Discovering Human Activity Community in a City Tianyuan Huang	7-8
Section 2: Workshop Reports
The 1st ACM SIGSPATIAL International Workshop on Computing with Multifaceted Movement Data (MOVE++ 2019) Marc van Kreveld, Bettina Speckmann, Matei Stroila, Goce Trajcevski	9-11
The 1st ACM SIGSPATIAL International Workshop on Geo-computational Thinking in Education (GeoEd 2019) Amr Magdy, Coline Dony	12-13
The 1st ACM SIGSPATIAL International Workshop on Geospatial Data Access and Processing APIs (SpatialAPI 2019) Ahmed Eldawy	14
The 1st ACM SIGSPATIAL International Workshop on Spatial Gems (SpatialGems 2019) John Krumm, Cyrus Shahabi, Andreas Züfle	15-17
The 2nd ACM SIGSPATIAL International Workshop on Advances on Resilient and Intelligent Cities (ARIC 2019) Bandana Kar, Olufemi A. Omitaomu, Xinyue Ye, Shima Mohebbi, Guangtao Fu	18-19
The 2nd ACM SIGSPATIAL International Workshop on GeoSpatial Simulation (GeoSim 2019) Joon-Seok Kim, Hamdi Kavak, Dieter Pfoser, Andrew Crooks, Carola Wenk, Sarah Wise	21-22
The 3rd ACM SIGSPATIAL International Workshop on AI for Geographic Knowledge Discovery (GeoAI 2019) Song Gao, Shawn Newsam, Liang Zhao, Dalton Lunga, Yingjie Hu, Bruno Martins, Xun Zhou, Feng Chen	23-24
The 3rd ACM SIGSPATIAL International Workshop on Analytics for Local Events and News (LENS 2019) Haiquan Chen, Federico Iuricich, Amr Magdy	25-26
The 3rd ACM SIGSPATIAL International Workshop on Geospatial Humanities (GeoHumanities 2019) Bruno Martins, Ludovic Moncla, Patricia Murrieta-Flores	27-29
The 3rd ACM SIGSPATIAL International Workshop on Location-Based Recommendations, Geosocial Networks, and Geoadvertising (LocalRec 2019) Panagiotis Bouros, Tamraparni Dasu, Yaron Kanza, Matthias Renz, Dimitris Sacharidis	30-33
The 3rd ACM SIGSPATIAL International Workshop on Prediction of Human Mobility (PredictGIS 2019) Satish V. Ukkusuri, Kaoru Sezaki, Takahiro Yabe, Kota Tsubouchi	34-37
The 8th ACM SIGSPATIAL International Workshop on Analytics for Big Geospatial Data (BigSpatial 2019) Ashwin Shashidharan, Varun Chandola, Ranga Raju Vatsavai	38-39
Section 3: Event Announcements
Call for Submissions: The Sixth International ACM SIGMOD Workshop on Enriched Geo-Spatial Data (GeoRich 2020) Panagiotis Bouros, Amr Magdy, Matthias Renz, Mohamed Sarwat, Andreas Züfle	40-41
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SIGSPATIAL Special Newsletter July 2019 (Volume 11, Number 2): Visions and Challenges

Volume 11, Number 2, July 2019

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Foreword	i-ii
Message from the Editor Andreas Züfle	1
Section 1: Special Issue on Visions and Challenges
Introduction to this Special Issue Andreas Züfle	2-4
GeoAI at ACM SIGSPATIAL: Progress, Challenges, and Future Directions Yingjie Hu, Song Gao, Dalton Lunga, Wenwen Li, Shawn Newsam, Budhendra Bhaduri	5-15
Batman or the Joker? The Powerful Urban Computing and its Ethics Issues Kaiqun Fu, Abdulaziz Alhamadani, Taoran Ji, Chang-Tien Lu	16-25
Quantum Spatial Computing Martin Werner	26-33
Section 2: Tools and Datasets
UCR-STAR: The UCR Spatio-temporal Active Repository Saheli Ghosh, Tin Vu, Mehrad Amin Eskandari, Ahmed Eldawy	34-40

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SIGSPATIAL Special Newsletter March 2019 (Volume 11, Number 1): Spatial Query Processing and Traffic Simulation

Volume 11, Number 1, March 2019

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Foreword	i-ii
Message from the Editor Andreas Züfle	1
Section 1: Special Issue on Spatial Query Processing and Traffic Simulation
Introduction to this Special Issue Andreas Züfle	2
Spatial Pattern Matching: A New Direction for Finding Spatial Objects Yun Li, Yixiang Fang, Reynold Cheng, Wenjie Zhang	3-12
Spatial Joins: What’s next? Panagiotis Bouros, Nikos Mamoulis	13-21
Generating Traffic Data for Any City using SMARTS Simulator Hairuo Xie, Egemen Tanin, Kotagiri Ramamohanarao, Shanika Karunasekera, Lars Kulik, Rui Zhang, Jianzhong Qi	22-28
Section 2: Event Reports
Conference Report: The 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2018) Seattle, Washington, USA November 6-9, 2018 Ralf Hartmut Güting, Roberto Tamassia, Li Xiong, Farnoush Banaei-Kashani, Erik Hoel	29-31
ACM SIGSPATIAL Cup 2018 – Identifying Upstream Features in Large Spatial Networks Dev Oliver, Bo Xu, Yuanyuan Pao	32-35
Spatial Gems: A New Type of Workshop at the SIGSPATIAL Conference John Krumm, Cyrus Shahabi, Andreas Züfle	36

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