Alexander Zipf

171 papers C 5Journal 107Unranked 48

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Assessing Building Heat Resilience Using UAV and Street-View Imagery with Coupled Global Context Vision Transformer. CoRR Steffen Knoblauch, Ram Kumar Muthusamy, Hao Li, Iddy Chazua, Benedcto Adamu, Innocent Maholi, Alexander Zipf
2026	J	`jnl`	Automated Road Crack Localization to Guide Highway Maintenance. CoRR Steffen Knoblauch, Ram Kumar Muthusamy, Pedram Ghamisi, Alexander Zipf
2026	J	`jnl`	Corporate mapping in OpenStreetMap - shifting trends in global evolution and small-scale effects. Geo spatial Inf. Sci. Lilly Tockner, Benjamin Herfort, Sven Lautenbach, Alexander Zipf
2026	J	`jnl`	Estimating road speed classes: Integrating OpenStreetMap and Street View imagery for missing data imputation. Comput. Environ. Urban Syst. Shiyu Tang, Sukanya Randhawa, Jin Rui, Christina Ludwig, Steffen Knoblauch, Charles Hatfield, Alexander Zipf
2025	—	`conf`	Accessibility for pedestrians under heat stress - the example of Heidelberg, Germany. AGILE Conference Johannes Huber, Christina Ludwig, Kathrin Foshag, Nikolaos Kolaxidis, Alexander Zipf, Sven Lautenbach
2025	—	`conf`	Changes in Road Centrality and Hospital Access Redundancy: Impacts of the 2024 Flood in the Metropolitan Core of Porto Alegre, Brazil. AGILE Conference Ricardo Ruiz Sánchez, Marcel Reinmuth, Cristian Albornoz, Sven Lautenbach, Alexander Zipf
2025	J	`jnl`	Deep learning enhanced road traffic analysis: Scalable vehicle detection and velocity estimation using PlanetScope imagery. Int. J. Appl. Earth Obs. Geoinformation Maciej Adamiak, Yulia Grinblat, Julian Psotta, Nir Fulman, Himshikhar Mazumdar, Shiyu Tang, Alexander Zipf
2025	J	`jnl`	Mitigating Heat Stress by Reducing Solar Exposure in Pedestrian Routing. Trans. GIS Nikolaos Kolaxidis, Christina Ludwig, Steffen Knoblauch, Johannes Fürle, Kathrin Foshag, Sascha Fendrich, Sven Lautenbach, Alexander Zipf
2025	J	`jnl`	STVAE: Skip connection driven Two-stream property fusion Variational AutoEncoder for cross-region wastewater treatment plant semantic segmentation. Inf. Fusion Yuze Li, Yan Zhang, Sukanya Randhawa, Chunling Yang, Alexander Zipf
2025	J	`jnl`	The changing surface of the world's roads. CoRR Sukanya Randhawa, Guntaj Randhawa, Clemens Langer, Francis Andorful, Benjamin Herfort, Daniel Kwakye, Omer Olchik, Sven Lautenbach, Alexander Zipf
2024	J	`jnl`	An investigation of the temporality of OpenStreetMap data contribution activities. Geo spatial Inf. Sci. Tessio Novack, Leonard Vorbeck, Alexander Zipf
2024	J	`jnl`	Deep Learning Enhanced Road Traffic Analysis: Scalable Vehicle Detection and Velocity Estimation Using PlanetScope Imagery. CoRR Maciej Adamiak, Yulia Grinblat, Julian Psotta, Nir Fulman, Himshikhar Mazumdar, Shiyu Tang, Alexander Zipf
2024	J	`jnl`	Distortions in Judged Spatial Relations in Large Language Models: The Dawn of Natural Language Geographic Data? CoRR Nir Fulman, Abdulkadir Memduhoglu, Alexander Zipf
2024	J	`jnl`	Enriching building function classification using Large Language Model embeddings of OpenStreetMap Tags. Earth Sci. Informatics Abdulkadir Memduhoglu, Nir Fulman, Alexander Zipf
2024	—	`conf`	Evidence for Systematic Bias in the Spatial Memory of Large Language Models. GeoExT@ECIR Nir Fulman, Abdulkadir Memduhoglu, Alexander Zipf
2024	J	`jnl`	Paved or unpaved? A Deep Learning derived Road Surface Global Dataset from Mapillary Street-View Imagery. CoRR Sukanya Randhawa, Eren Aygun, Guntaj Randhawa, Benjamin Herfort, Sven Lautenbach, Alexander Zipf
2024	—	`conf`	UAV-Assisted Municipal Solid Waste Monitoring for Informed Disposal Decisions. GoodIT Steffen Knoblauch, Levi Szamek, Jonas Wenk, Iddy Chazua, Innocent Maholi, Maciej Adamiak, Sven Lautenbach, Alexander Zipf
2023	J	`jnl`	Cross-City Matters: A Multimodal Remote Sensing Benchmark Dataset for Cross-City Semantic Segmentation using High-Resolution Domain Adaptation Networks. CoRR Danfeng Hong, Bing Zhang, Hao Li, Yuxuan Li, Jing Yao, Chenyu Li, Martin Werner, Jocelyn Chanussot, Alexander Zipf, Xiao Xiang Zhu
2023	—	`conf`	Exploring MapSwipe as a Crowdsourcing Tool for (Rapid) Damage Assessment: The Case of the 2021 Haiti Earthquake. AGILE Conf. Simon Groß, Benjamin Herfort, Sabrina Marx, Alexander Zipf
2023	—	`conf`	Multiscale Multifeature Vision Learning for Scalable and Efficient Wastewater Treatment Plant Detection using Hi-Res Satellite Imagery and OSM. UrbanAI@SIGSPATIAL Sukanya Randhawa, Guntaj Randhawa, Olena Sivak, Johannes Zech, Maria Martin, Alexander Zipf, Yuze Li
2023	J	`jnl`	Private Vehicles Greenhouse Gas Emission Estimation at Street Level for Berlin Based on Open Data. ISPRS Int. J. Geo Inf. Veit Ulrich, Josephine Brückner, Michael Schultz, Sanam Noreen Vardag, Christina Ludwig, Johannes Fürle, Mohammed Zia, Sven Lautenbach, Alexander Zipf
2023	—	`conf`	Semi-Supervised Learning from Street-View Images and OpenStreetMap for Automatic Building Height Estimation. GIScience Hao Li, Zhendong Yuan, Gabriel Dax, Gefei Kong, Hongchao Fan, Alexander Zipf, Martin Werner
2023	J	`jnl`	Semi-supervised Learning from Street-View Images and OpenStreetMap for Automatic Building Height Estimation. CoRR Hao Li, Zhendong Yuan, Gabriel Dax, Gefei Kong, Hongchao Fan, Alexander Zipf, Martin Werner
2023	J	`jnl`	Semi-supervised water tank detection to support vector control of emerging infectious diseases transmitted by Int. J. Appl. Earth Obs. Geoinformation Steffen Knoblauch, Hao Li, Sven Lautenbach, Yara Elshiaty, Antônio A. de A. Rocha, Bernd Resch, Dorian Arifi, Thomas Jänisch, Ivonne Morales, Alexander Zipf
2023	—	`conf`	Using VGI for Social Good: Potentials and Pitfalls for Using OSM for Humanitarian Aid and Climate Mitigation. GISTAM Alexander Zipf
2022	J	`jnl`	Das Potenzial von Citizen Science für die Kartierung von Landschaftsveränderungen in arktischen Permafrostregionen / The Potential of Citizen Science for Mapping Landscape Change in Arctic Permafrost Regions. AGIT Journal Angew. Geoinformatik Oliver Fritz, Sabrina Marx, Benjamin Herfort, Soraya Kaiser, Moritz Langer, Josefine Lenz, Christian Thiel, Alexander Zipf
2022	J	`jnl`	Improving OpenStreetMap missing building detection using few-shot transfer learning in sub-Saharan Africa. Trans. GIS Hao Li, Benjamin Herfort, Sven Lautenbach, Jiaoyan Chen, Alexander Zipf
2022	J	`jnl`	Leveraging OpenStreetMap and Multimodal Remote Sensing Data with Joint Deep Learning for Wastewater Treatment Plants Detection. Int. J. Appl. Earth Obs. Geoinformation Hao Li, Johannes Zech, Danfeng Hong, Pedram Ghamisi, Michael Schultz, Alexander Zipf
2022	—	`conf`	OpenStreetMap Tools for Humanitarian Aid. GEOINFO Alexander Zipf, Amandaus Butzer, Marcel Reinmuth, Michael Auer, Benjamin Herfort, Adam Rousell, Sven Lautenbach, Stefan Gumbrich
2022	J	`jnl`	SocialMedia2Traffic: Derivation of Traffic Information from Social Media Data. ISPRS Int. J. Geo Inf. Mohammed Zia, Johannes Fürle, Christina Ludwig, Sven Lautenbach, Stefan Gumbrich, Alexander Zipf
2022	J	`jnl`	Understanding spatiotemporal trip purposes of urban micro-mobility from the lens of dockless e-scooter sharing. Comput. Environ. Urban Syst. Hao Li, Zhendong Yuan, Tessio Novack, Wei Huang, Alexander Zipf
2021	J	`jnl`	An analysis of the spatial and temporal distribution of large-scale data production events in OpenStreetMap. Trans. GIS Asher Yair Grinberger, Moritz Schott, Martin Raifer, Alexander Zipf
2021	J	`jnl`	Analysing the Impact of Large Data Imports in OpenStreetMap. ISPRS Int. J. Geo Inf. Raphael Witt, Lukas Loos, Alexander Zipf
2021	—	`conf`	Assessing shop completeness in OpenStreetMap for two federal states in Germany. AGILE Conf. Josephine Brückner, Moritz Schott, Alexander Zipf, Sven Lautenbach
2021	J	`jnl`	Automatic mapping of national surface water with OpenStreetMap and Sentinel-2 MSI data using deep learning. Int. J. Appl. Earth Obs. Geoinformation Hao Li, Johannes Zech, Christina Ludwig, Sascha Fendrich, Aurélie Shapiro, Michael Schultz, Alexander Zipf
2021	—	`conf`	Comparison of Simulated Fast and Green Routes for Cyclists and Pedestrians. GIScience (II) Christina Ludwig, Sven Lautenbach, Eva-Marie Schömann, Alexander Zipf
2021	—	`conf`	Detecting OpenStreetMap missing buildings by transferring pre-trained deep neural networks. AGILE Conf. Jan Pisl, Hao Li, Sven Lautenbach, Benjamin Herfort, Alexander Zipf
2021	J	`jnl`	Entwicklung eines Regressionsmodells für die Vollständigkeitsanalyse des globalen OpenStreetMap- Datenbestands an Nahverkehrs-Busstrecken / Development of a Regression Model for the Analysis of Local Bus Route Data Completeness on OpenStreetMap. AGIT Journal Angew. Geoinformatik Oliver Fritz, Michael Auer, Alexander Zipf
2021	—	`conf`	Flood Impact Assessment on Road Network and Healthcare Access at the example of Jakarta, Indonesia. AGILE Conf. Isabell G. Klipper, Alexander Zipf, Sven Lautenbach
2021	J	`jnl`	Mapping Public Urban Green Spaces Based on OpenStreetMap and Sentinel-2 Imagery Using Belief Functions. ISPRS Int. J. Geo Inf. Christina Ludwig, Robert Hecht, Sven Lautenbach, Martin Schorcht, Alexander Zipf
2021	J	`jnl`	Quiet Route Planning for Pedestrians in Traffic Noise Polluted Environments. IEEE Trans. Intell. Transp. Syst. Zhiyong Wang, Tessio Novack, Yingwei Yan, Alexander Zipf
2021	J	`jnl`	Regional variations of context-based association rules in OpenStreetMap. Trans. GIS Christina Ludwig, Sascha Fendrich, Alexander Zipf
2021	J	`jnl`	Room semantics inference using random forest and relational graph convolutional networks: A case study of research building. Trans. GIS Xuke Hu, Hongchao Fan, Alexey Noskov, Zhiyong Wang, Alexander Zipf, Fuqiang Gu, Jianga Shang
2021	J	`jnl`	Tagging the main entrances of public buildings based on OpenStreetMap and binary imbalanced learning. Int. J. Geogr. Inf. Sci. Xuke Hu, Alexey Noskov, Hongchao Fan, Tessio Novack, Hao Li, Fuqiang Gu, Jianga Shang, Alexander Zipf
2021	J	`jnl`	The Impact of Community Happenings in OpenStreetMap - Establishing a Framework for Online Community Member Activity Analyses. ISPRS Int. J. Geo Inf. Moritz Schott, Asher Yair Grinberger, Sven Lautenbach, Alexander Zipf
2021	J	`jnl`	The Sketch Map Tool Facilitates the Assessment of OpenStreetMap Data for Participatory Mapping. ISPRS Int. J. Geo Inf. Carolin Klonner, Maximilian Hartmann, Rebecca Dischl, Lily Djami, Liana O. Anderson, Martin Raifer, Fernanda Lima-Silva, Lívia Castro Degrossi, Alexander Zipf, João Porto de Albuquerque
2020	J	`jnl`	A Multi-Sensor Fusion Framework Based on Coupled Residual Convolutional Neural Networks. Remote. Sens. Hao Li, Pedram Ghamisi, Behnood Rasti, Zhaoyan Wu, Aurélie Shapiro, Michael Schultz, Alexander Zipf
2020	J	`jnl`	Data-driven approach to learning salience models of indoor landmarks by using genetic programming. Int. J. Digit. Earth Xuke Hu, Lei Ding, Jianga Shang, Hongchao Fan, Tessio Novack, Alexey Noskov, Alexander Zipf
2020	—	`conf`	Leveraging User Generated Geoinformation for Humanitarian Aid: Potentials and Challenges. GISTAM Alexander Zipf
2020	J	`jnl`	Towards Detecting Building Facades with Graffiti Artwork Based on Street View Images. ISPRS Int. J. Geo Inf. Tessio Novack, Leonard Vorbeck, Heinrich Lorei, Alexander Zipf
2020	J	`jnl`	Volunteered geographic information research in the first decade: a narrative review of selected journal articles in GIScience. Int. J. Geogr. Inf. Sci. Yingwei Yan, Chen-Chieh Feng, Wei Huang, Hongchao Fan, Yi-Chen Wang, Alexander Zipf
2019	J	`jnl`	An exploratory analysis of usability of Flickr tags for land use/land cover attribution. Geo spatial Inf. Sci. Yingwei Yan, Michael Schultz, Alexander Zipf
2019	J	`jnl`	Deep Learning From Multiple Crowds: A Case Study of Humanitarian Mapping. IEEE Trans. Geosci. Remote. Sens. Jiaoyan Chen, Yan Zhou, Alexander Zipf, Hongchao Fan
2019	J	`jnl`	Feasibility of Using Grammars to Infer Room Semantics. Remote. Sens. Xuke Hu, Hongchao Fan, Alexey Noskov, Alexander Zipf, Zhiyong Wang, Jianga Shang
2019	J	`jnl`	Mapping Human Settlements with Higher Accuracy and Less Volunteer Efforts by Combining Crowdsourcing and Deep Learning. Remote. Sens. Benjamin Herfort, Hao Li, Sascha Fendrich, Sven Lautenbach, Alexander Zipf
2018	J	`jnl`	3D WebGIS: From Visualization to Analysis. An Efficient Browser-Based 3D Line-of-Sight Analysis. ISPRS Int. J. Geo Inf. Michael Auer, Alexander Zipf
2018	J	`jnl`	A System for Generating Customized Pleasant Pedestrian Routes Based on OpenStreetMap Data. Sensors Tessio Novack, Zhiyong Wang, Alexander Zipf
2018	J	`jnl`	A taxonomy of quality assessment methods for volunteered and crowdsourced geographic information. Trans. GIS Lívia Castro Degrossi, João Porto de Albuquerque, Roberto dos Santos Rocha, Alexander Zipf
2018	J	`jnl`	Assessing spatiotemporal predictability of LBSN: a case study of three Foursquare datasets. GeoInformatica Ming Li, René Westerholt, Hongchao Fan, Alexander Zipf
2018	J	`jnl`	Coupling maximum entropy modeling with geotagged social media data to determine the geographic distribution of tourists. Int. J. Geogr. Inf. Sci. Yingwei Yan, Chiao-Ling Kuo, Chen-Chieh Feng, Wei Huang, Hongchao Fan, Alexander Zipf
2018	J	`jnl`	Do people communicate about their whereabouts? Investigating the relation between user-generated text messages and Foursquare check-in places. Geo spatial Inf. Sci. Ming Li, René Westerholt, Alexander Zipf
2018	J	`jnl`	Efficient Method for POI/ROI Discovery Using Flickr Geotagged Photos. ISPRS Int. J. Geo Inf. Chiao-Ling Kuo, Ta-Chien Chan, I-Chun Fan, Alexander Zipf
2018	J	`jnl`	Enrichment of OpenStreetMap Data Completeness with Sidewalk Geometries Using Data Mining Techniques. Sensors Amin Mobasheri, Haosheng Huang, Lívia Castro Degrossi, Alexander Zipf
2018	J	`jnl`	Graph-Based Matching of Points-of-Interest from Collaborative Geo-Datasets. ISPRS Int. J. Geo Inf. Tessio Novack, Robin Peters, Alexander Zipf
2018	J	`jnl`	Ohsome - eine Plattform zur Analyse raumzeitlicher Entwicklungen von OpenStreetMap-Daten für intrinsische QualitätsbewertungenOhsome - An OpenStreetMap History Analytics Platform for Intrinsic Quality Assessments. AGIT Journal Angew. Geoinformatik Michael Auer, Melanie Eckle, Sascha Fendrich, Fabian Kowatsch, Lukas Loos, Sabrina Marx, Martin Raifer, Moritz Schott, Rafael Troilo, Alexander Zipf
2018	J	`jnl`	OpenStreetMap data quality enrichment through awareness raising and collective action tools - experiences from a European project. Geo spatial Inf. Sci. Amin Mobasheri, Alexander Zipf, Louise Francis
2018	J	`jnl`	Routing through open spaces - A performance comparison of algorithms. Geo spatial Inf. Sci. Stefan Hahmann, Jakob Miksch, Bernd Resch, Johannes Lauer, Alexander Zipf
2018	—	`conf`	Towards Using the Potential of OpenStreetMap History for Disaster Activation Monitoring. ISCRAM Michael Auer, Melanie Eckle, Sascha Fendrich, Luisa Griesbaum, Fabian Kowatsch, Sabrina Marx, Martin Raifer, Moritz Schott, Rafael Troilo, Alexander Zipf
2018	—	`conf`	Towards the Statistical Analysis and Visualization of Places (Short Paper). GIScience René Westerholt, Mathias Gröbe, Alexander Zipf, Dirk Burghardt
2018	J	`jnl`	Volunteered Geographic Information for Disaster Risk Reduction - The Missing Maps Approach and Its Potential within the Red Cross and Red Crescent Movement. Remote. Sens. Stefan Scholz, Paul Knight, Melanie Eckle, Sabrina Marx, Alexander Zipf
2017	—	`conf`	A Framework of Quality Assessment Methods for Crowdsourced Geographic Information: a Systematic Literature Review. ISCRAM Lívia Castro Degrossi, João Porto de Albuquerque, Roberto dos Santos Rocha, Alexander Zipf
2017	J	`jnl`	Completeness of citizen science biodiversity data from a volunteered geographic information perspective. Geo spatial Inf. Sci. Clemens Jacobs, Alexander Zipf
2017	—	`conf`	DeepVGI: Deep Learning with Volunteered Geographic Information. WWW (Companion Volume) Jiaoyan Chen, Alexander Zipf
2017	J	`jnl`	Detecting repetitive structures on building footprints for the purposes of 3D modeling and reconstruction. Int. J. Digit. Earth Hongchao Fan, Alexander Zipf, Hangbin Wu
2017	J	`jnl`	Einsatz von OpenStreetMap-Daten zur Erstellung von Landnutzungsprodukten am Beispiel von OSM Landuse Landcover. AGIT Journal Angew. Geoinformatik Janek Voss, Michael Auer, Michael Schultz, Alexander Zipf
2017	—	`conf`	Exploring the geographical context for quality assessment of VGI in flood management domain. AMCIS Lívia Castro Degrossi, João Porto de Albuquerque, Camilo Ernesto Restrepo-Estrada, Amin Mobasheri, Alexander Zipf
2017	J	`jnl`	Highlighting Current Trends in Volunteered Geographic Information. ISPRS Int. J. Geo Inf. David Jonietz, Vyron Antoniou, Linda See, Alexander Zipf
2017	J	`jnl`	Monitoring and Assessing Post-Disaster Tourism Recovery Using Geotagged Social Media Data. ISPRS Int. J. Geo Inf. Yingwei Yan, Melanie Eckle, Chiao-Ling Kuo, Benjamin Herfort, Hongchao Fan, Alexander Zipf
2017	J	`jnl`	Open land cover from OpenStreetMap and remote sensing. Int. J. Appl. Earth Obs. Geoinformation Michael Schultz, Janek Voss, Michael Auer, Sarah Carter, Alexander Zipf
2017	J	`jnl`	Partizipative Methoden zur Erfassung und Verarbeitung von Geoinformationen. HMD Prax. Wirtsch. Luisa Griesbaum, Melanie Eckle, Benjamin Herfort, Martin Raifer, Alexander Zipf
2017	J	`jnl`	The OpenStreetMap folksonomy and its evolution. Geo spatial Inf. Sci. Franz-Benjamin Mocnik, Alexander Zipf, Martin Raifer
2017	J	`jnl`	Towards Detecting the Crowd Involved in Social Events. ISPRS Int. J. Geo Inf. Wei Huang, Hongchao Fan, Alexander Zipf
2017	J	`jnl`	Towards a Landmark-Based Pedestrian Navigation Service Using OSM Data. ISPRS Int. J. Geo Inf. Adam Rousell, Alexander Zipf
2017	—	`conf`	Towards using Volunteered Geographic Information to monitor post-disaster recovery in tourist destinations. ISCRAM Melanie Eckle, Benjamin Herfort, Yingwei Yan, Chiao-Ling Kuo, Alexander Zipf
2016	J	`jnl`	A polygon-based approach for matching OpenStreetMap road networks with regional transit authority data. Int. J. Geogr. Inf. Sci. Hongchao Fan, Bisheng Yang, Alexander Zipf, Adam Rousell
2016	J	`jnl`	Defining Fitness-for-Use for Crowdsourced Points of Interest (POI). ISPRS Int. J. Geo Inf. David Jonietz, Alexander Zipf
2016	J	`jnl`	Echtzeitverkehrslage basierend auf OSM-Daten im OpenRouteService. AGIT Journal Angew. Geoinformatik Enrico Steiger, Maksim Rylov, Alexander Zipf
2016	J	`jnl`	Entscheidungsunterstützung im Hochwassermanagement - Integration von Kritischer Infrastruktur und Notfallrouting auf der Basis freier Geodaten. AGIT Journal Angew. Geoinformatik Melanie Eckle, João Porto de Albuquerque, Benjamin Herfort, Alexander Zipf
2016	J	`jnl`	Exploration of spatiotemporal and semantic clusters of Twitter data using unsupervised neural networks. Int. J. Geogr. Inf. Sci. Enrico Steiger, Bernd Resch, Alexander Zipf
2016	J	`jnl`	GIS-Werkzeuge zur Verbesserung der barrierefreien Routenplanung aus dem Projekt CAP4Access. AGIT Journal Angew. Geoinformatik Stefan Hahmann, Alexander Zipf, Adam Rousell, Amin Mobasheri, Lukas Loos, Maxim A. Rylov, Enrico Steiger, Johannes Lauer
2016	J	`jnl`	Guided Classification System for Conceptual Overlapping Classes in OpenStreetMap. ISPRS Int. J. Geo Inf. Ahmed Loai Ali, Nuttha Sirilertworakul, Alexander Zipf, Amin Mobasheri
2016	—	`conf`	Leveraging OpenStreetMap to Support Flood Risk Management in Municipalities: A Prototype Decision Support System. ISCRAM Melanie Eckle, João Porto de Albuquerque, Benjamin Herfort, Alexander Zipf, Richard Leiner, Rüdiger Wolff, Clemens Jacobs
2016	J	`jnl`	MayaArch3D - webbasierte archäologische 3D-Visualisierung und Analyse. AGIT Journal Angew. Geoinformatik Michael Auer, Lukas Loos, Alexander Zipf
2016	—	`ch.`	Show Me the Data!: Structuring Archaeological Data to Deliver Interactive, Transparent 3D Reconstructions in a 3D WebGIS. 3D Research Challenges in Cultural Heritage Jennifer von Schwerin, Mike Lyons, Lukas Loos, Nicolas Billen, Michael Auer, Alexander Zipf
2016	J	`jnl`	Temporal Analysis on Contribution Inequality in OpenStreetMap: A Comparative Study for Four Countries. ISPRS Int. J. Geo Inf. Anran Yang, Hongchao Fan, Ning Jing, Yeran Sun, Alexander Zipf
2016	—	`conf`	Where the Streets Have Known Names. ICCSA (4) Paulo Dias Almeida, Jorge Gustavo Rocha, Andrea Ballatore, Alexander Zipf
2015	—	`conf`	A Conceptual Quality Framework for Volunteered Geographic Information. COSIT Andrea Ballatore, Alexander Zipf
2015	J	`jnl`	A geographic approach for combining social media and authoritative data towards identifying useful information for disaster management. Int. J. Geogr. Inf. Sci. João Porto de Albuquerque, Benjamin Herfort, Alexander Brenning, Alexander Zipf
2015	J	`jnl`	A local scale-sensitive indicator of spatial autocorrelation for assessing high- and low-value clusters in multiscale datasets. Int. J. Geogr. Inf. Sci. René Westerholt, Bernd Resch, Alexander Zipf
2015	J	`jnl`	An Advanced Systematic Literature Review on Spatiotemporal Analyses of Twitter Data. Trans. GIS Enrico Steiger, João Porto de Albuquerque, Alexander Zipf
2015	J	`jnl`	An Exploration of Future Patterns of the Contributions to OpenStreetMap and Development of a Contribution Index. Trans. GIS Jamal Jokar Arsanjani, Peter Mooney, Marco Helbich, Alexander Zipf
2015	—	`ch.`	An Introduction to OpenStreetMap in Geographic Information Science: Experiences, Research, and Applications. OpenStreetMap in GIScience Jamal Jokar Arsanjani, Alexander Zipf, Peter Mooney, Marco Helbich
2015	J	`jnl`	Erstellung eines OSM-Straßengraphen mit TMC-LCL-Informationen. AGIT Journal Angew. Geoinformatik Enrico Steiger, Alexander Zipf
2015	—	`book`	OpenStreetMap in GIScience - Experiences, Research, and Applications Jamal Jokar Arsanjani, Alexander Zipf, Peter Mooney, Marco Helbich
2015	—	`ch.`	Quality Assessment of the Contributed Land Use Information from OpenStreetMap Versus Authoritative Datasets. OpenStreetMap in GIScience Jamal Jokar Arsanjani, Peter Mooney, Alexander Zipf, Anne Schauss
2015	J	`jnl`	Quality Evaluation of VGI Using Authoritative Data - A Comparison with Land Use Data in Southern Germany. ISPRS Int. J. Geo Inf. Helen Dorn, Tobias Törnros, Alexander Zipf
2015	J	`jnl`	Road-based travel recommendation using geo-tagged images. Comput. Environ. Urban Syst. Yeran Sun, Hongchao Fan, Mohamed Bakillah, Alexander Zipf
2015	—	`conf`	Towards assessing the quality of volunteered geographic information from OpenStreetMap for identifying critical infrastructures. ISCRAM Benjamin Herfort, Melanie Eckle, João Porto de Albuquerque, Alexander Zipf
2015	J	`jnl`	Twitter as an indicator for whereabouts of people? Correlating Twitter with UK census data. Comput. Environ. Urban Syst. Enrico Steiger, René Westerholt, Bernd Resch, Alexander Zipf
2014	J	`jnl`	A Comprehensive Framework for Intrinsic OpenStreetMap Quality Analysis. Trans. GIS Christopher Barron, Pascal Neis, Alexander Zipf
2014	—	`conf`	Does the spatiotemporal distribution of tweets match the spatiotemporal distribution of flood phenomena? A study about the River Elbe Flood in June 2013. ISCRAM Benjamin Herfort, João Porto de Albuquerque, Svend-Jonas Schelhorn, Alexander Zipf
2014	—	`conf`	Estimation of Building Types on OpenStreetMap Based on Urban Morphology Analysis. AGILE Conf. Hongchao Fan, Alexander Zipf, Qing Fu
2014	—	`conf`	Explorative public transport flow analysis from uncertain social media data. GEOGROWD Enrico Steiger, Timothy Ellersiek, Alexander Zipf
2014	—	`conf`	Exploring the Geographical Relations Between Social Media and Flood Phenomena to Improve Situational Awareness - A Study About the River Elbe Flood in June 2013. AGILE Conf. Benjamin Herfort, João Porto de Albuquerque, Svend-Jonas Schelhorn, Alexander Zipf
2014	J	`jnl`	Fine-resolution population mapping using OpenStreetMap points-of-interest. Int. J. Geogr. Inf. Sci. Mohamed Bakillah, Steve H. L. Liang, Amin Mobasheri, Jamal Jokar Arsanjani, Alexander Zipf
2014	—	`conf`	Identifying elements at risk from OpenStreetMap: The case of flooding. ISCRAM Svend-Jonas Schelhorn, Benjamin Herfort, Richard Leiner, Alexander Zipf, João Porto de Albuquerque
2014	J	`jnl`	Quality assessment for building footprints data on OpenStreetMap. Int. J. Geogr. Inf. Sci. Hongchao Fan, Alexander Zipf, Qing Fu, Pascal Neis
2014	J	`jnl`	Taking Stock. Trans. GIS John P. Wilson, Qiming Zhou, Alexander Zipf
2014	—	`conf`	TeleAgro+: analysis framework for agricultural telematics data. IWCTS@SIGSPATIAL Johannes Lauer, Ludwig Richter, Timothy Ellersiek, Alexander Zipf
2013	J	`jnl`	A dynamic and context-aware semantic mediation service for discovering and fusion of heterogeneous sensor data. J. Spatial Inf. Sci. Mohamed Bakillah, Steve H. L. Liang, Alexander Zipf, Mir Abolfazl Mostafavi
2013	—	`conf`	A mobile sensor data acquisition and evaluation framework for crowd sourcing data. GEOGROWD Nicolas Billen, Johannes Lauer, Alexander Zipf
2013	—	`ch.`	Adapting OSM-3D to the Mobile World: Challenges and Potentials. Progress in Location-Based Services Ming Li, Marcus Goetz, Hongchao Fan, Alexander Zipf
2013	—	`ch.`	Analyzing Human Activities Through Volunteered Geographic Information: Using Flickr to Analyze Spatial and Temporal Pattern of Tourist Accommodation. Progress in Location-Based Services Yeran Sun, Hongchao Fan, Marco Helbich, Alexander Zipf
2013	J	`jnl`	Comparison of Volunteered Geographic Information Data Contributions and Community Development for Selected World Regions. Future Internet Pascal Neis, Dennis Zielstra, Alexander Zipf
2013	—	`ch.`	Indoor Route Planning with Volunteered Geographic Information on a (Mobile) Web-Based Platform. Progress in Location-Based Services Marcus Goetz, Alexander Zipf
2013	—	`conf`	Processing crowd sourced sensor data: from data acquisition to application. CTS@SIGSPATIAL Johannes Lauer, Nicolas Billen, Alexander Zipf
2013	—	`conf`	Publish/Subscribe System Based on Event Calculus to Support Real-Time Multi-Agent Evacuation Simulation. AGILE Conf. Mohamed Bakillah, Alexander Zipf, Steve H. L. Liang
2013	J	`jnl`	Semantic Interoperability of Sensor Data with Volunteered Geographic Information: A Unified Model. ISPRS Int. J. Geo Inf. Mohamed Bakillah, Steve H. L. Liang, Alexander Zipf, Jamal Jokar Arsanjani
2013	J	`jnl`	Taking Stock. Trans. GIS John P. Wilson, David O'Sullivan, Alexander Zipf
2013	—	`conf`	The use of Volunteered Geographic Information (VGI) and Crowdsourcing in Disaster Management: a Systematic Literature Review. AMCIS Flávio Eduardo Aoki Horita, Lívia Castro Degrossi, Luiz Fernando Ferreira Gomes de Assis, Alexander Zipf, João Porto de Albuquerque
2013	J	`jnl`	Toward mapping land-use patterns from volunteered geographic information. Int. J. Geogr. Inf. Sci. Jamal Jokar Arsanjani, Marco Helbich, Mohamed Bakillah, Julian Hagenauer, Alexander Zipf
2012	J	`jnl`	Analyzing the Contributor Activity of a Volunteered Geographic Information Project - The Case of OpenStreetMap. ISPRS Int. J. Geo Inf. Pascal Neis, Alexander Zipf
2012	J	`jnl`	Area-wide roof plane segmentation in airborne LiDAR point clouds. Comput. Environ. Urban Syst. Andreas Jochem, Bernhard Höfle, Volker Wichmann, Martin Rutzinger, Alexander Zipf
2012	—	`ch.`	Location-Based Services. Springer Handbook of Geographic Information Alexander Zipf, Matthias Jöst
2012	—	`conf`	RIgeo.net - A Lab for Spatial Exploration of Historical Data. DH Lukas Loos, Alexander Zipf
2012	J	`jnl`	Real time query propagation strategies with Lightweight Coordination Calculus (LCC) for ad hoc networks of geospatial databases. J. Netw. Comput. Appl. Mohamed Bakillah, Mir Abolfazl Mostafavi, Steve H. L. Liang, Alexander Zipf
2012	J	`jnl`	Taking Stock. Trans. GIS John P. Wilson, David O'Sullivan, Alexander Zipf
2012	J	`jnl`	The Street Network Evolution of Crowdsourced Maps: OpenStreetMap in Germany 2007-2011. Future Internet Pascal Neis, Dennis Zielstra, Alexander Zipf
2012	J	`jnl`	Towards Automatic Vandalism Detection in OpenStreetMap. ISPRS Int. J. Geo Inf. Pascal Neis, Marcus Goetz, Alexander Zipf
2012	J	`jnl`	Towards Defining a Framework for the Automatic Derivation of 3D CityGML Models from Volunteered Geographic Information. Int. J. 3 D Inf. Model. Marcus Goetz, Alexander Zipf
2012	J	`jnl`	Using Crowdsourced Geodata for Agent-Based Indoor Evacuation Simulations. ISPRS Int. J. Geo Inf. Marcus Goetz, Alexander Zipf
2011	J	`jnl`	Formal definition of a user-adaptive and length-optimal routing graph for complex indoor environments. Geo spatial Inf. Sci. Marcus Goetz, Alexander Zipf
2011	—	`conf`	Interoperable integration of high precision 3D laser data and large scale geoanalysis in a SDI for Sutra inscriptions in Sichuan (China). Geoinformatik Sandra Lanig, Arne Schilling, Michael Auer, Bernhard Höfle, Nicolas Billen, Alexander Zipf
2010	J	`jnl`	Generating web-based 3D City Models from OpenStreetMap: The current situation in Germany. Comput. Environ. Urban Syst. Martin Over, Arne Schilling, Steffen Neubauer, Alexander Zipf
2010	—	`ed.`	Geoinformatik 2010 - Die Welt im Netz: Konferenzband, Kiel, Germany, March 17-19, 2010. Geoinformatik Alexander Zipf, Kai Behncke, Florian Hillen, Jens Schaefermeyer
2010	—	`conf`	Geoprozessîerung in Erneuerbaren Energien. Geoinformatik Sandra Lanig, Alexander Zipf, Martina Klärle
2009	J	`jnl`	Interoperable processing of digital elevation models in grid infrastructures. Earth Sci. Informatics Sandra Lanig, Alexander Zipf
2009	—	`conf`	Towards interoperable atmospheric (air flow) models in Spatial Data Infrastructures using OGC Web Services - state of the art and research questions. EnviroInfo (1) Wolfgang Johann Eder, Alexander Zipf
2008	J	`jnl`	Extending the OGC OpenLS Route Service to 3D for an interoperable realisation of 3D focus maps with landmarks. J. Locat. Based Serv. Pascal Neis, Alexander Zipf
2008	—	`conf`	How to Define 3D Geoprocessing Operations for the OGC Web Processing Service (WPS)? Towards a Classification of 3D Operations. ICCSA (1) Rüdiger Göbel, Alexander Zipf
2008	—	`conf`	Interoperable Routing Services in the Context of Evacuation Schemes due to Urban Flooding. EnviroInfo Holger Albert, Gernot Belger, Vinicius de Camargo, Michael Haase, Kaj Lippert, Pascal Neis, Erik Pasche, Alexander Zipf
2008	—	`book`	Map-based Mobile Services - Design, Interaction and Usability Liqiu Meng, Alexander Zipf, Stephan Winter
2008	—	`conf`	Towards Standards-Based Processing of Digital Elevation Models for Grid Computing through Web Processing Service (WPS). ICCSA (2) Sandra Lanig, Arne Schilling, Beate Stollberg, Alexander Zipf
2007	—	`ch.`	A visual editor for OGC SLD files for automating the configuration of WMS and mobile map applications. Location Based Services and TeleCartography Albrecht Weiser, Alexander Zipf
2007	C	`conf`	OGC Web Processing Service Interface for Web Service Orchestration Aggregating Geo-processing Services in a Bomb Threat Scenario. W2GIS Beate Stollberg, Alexander Zipf
2007	—	`conf`	Vector based Mapping of Polygons on Irregular Terrain Meshes for Web 3D Map Services. WEBIST (2) Arne Schilling, Jens Basanow, Alexander Zipf
2006	J	`jnl`	How do location-based services hit Google? Comput. Environ. Urban Syst. Bin Jiang, Alexander Zipf
2006	J	`jnl`	Implementing adaptive mobile GI services based on ontologies: Examples from pedestrian navigation support. Comput. Environ. Urban Syst. Alexander Zipf, Matthias Jöst
2005	—	`conf`	Finding geodata that otherwise would have been forgotten - GeoXchange: a SDI-based portal for sharing free geodata. GIR Sven Tschirner, Alexander Zipf
2005	—	`conf`	MOBILE MAPS 2005 interactivity and usability of map-based mobile services. Mobile HCI Alexander Zipf, Liqiu Meng
2005	C	`conf`	Using Styled Layer Descriptor (SLD) for the Dynamic Generation of User- and Context-Adaptive Mobile Maps - A Technical Framework. W2GIS Alexander Zipf
2004	J	`jnl`	Supporting Multi-Modal Interfaces for Adaptive Tour Planning. Ann. GIS Jochen Häußler, Alexander Zipf
2003	—	`conf`	Anforderungen an mobile Geo-Datenbanken für Katastropheninformations- und -warnsysteme. Database Mechanisms for Mobile Applications Alexander Zipf, Richard Leiner
2003	—	`conf`	Generation of VRML city models for focus based tour animations: integration, modeling and presentation of heterogeneous geo-data sources. Web3D Arne Schilling, Alexander Zipf
2003	C	`conf`	Location-based Mobile Tourist Services - First User Experiences. ENTER Barbara Schmidt-Belz, Heimo Laamanen, Stefan Poslad, Alexander Zipf
2002	J	`jnl`	Intelligent Systems for Tourism. IEEE Intell. Syst. Steffen Staab, Hannes Werthner, Francesco Ricci, Alexander Zipf, Ulrike Gretzel, Daniel R. Fesenmaier, Cécile Paris, Craig A. Knoblock
2002	—	`conf`	Realisierung eines mobilen Geodatenservers für PDAs auf der Basis von Standards des OpenGIS-Consortiums. Mobile Datenbanken und Informationssysteme Stefan Schmitz, Alexander Zipf, Hidir Aras
2002	C	`conf`	User-Adaptive Maps for Location-Based Services (LBS) for Tourism. ENTER Alexander Zipf
2002	J	`jnl`	Using Focus Maps to Ease Map Reading - Developing Smart Applications for Mobile Devices. Künstliche Intell. Alexander Zipf, Kai-Florian Richter
2001	C	`conf`	Developing Location Based Services for Tourism. The Service Providers' View. ENTER Alexander Zipf, Rainer Malaka
2001	—	`conf`	TGML - extending GML by Temporal Constructs - A Proposal for a Spatiotemporal Framework in XML. ACM-GIS Alexander Zipf, Sven Krüger