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GIScience Blog

Category: Publications

  • Exploring spatiotemporal and semantic clusters of Twitter data using unsupervised neural networks

    The investigation of human activity patterns from location-based social networks like Twitter is a promising example of how to infer relationships and latent information for the characterization of urban structures. While there is a growing research body performing spatial analysis on social media data, the high dimensionality, complexity and granularity of social media information still…

  • A Conceptual Quality Framework for Volunteered Geographic Information @ COSIT 2015 this Tuesday

    The Conference on Spatial Information Theory (COSIT) is taking place this week in Santa Fe, USA. This Tuesday our paper on “A Conceptual Quality Framework for Volunteered Geographic Information” by Andrea Ballatore and Alexander Zipf is being presented there. It outlines new proxy measures to several facets of conceptual quality, including accuracy, granularity, completeness, consistency,…

  • GIScience HD @ ISSDQ’15 in France

    CIScience Heidelberg members Dr. Tobias Törnros and Dr. Hongchao Fan attended the ISSDQ’15 (The 9th International Symposium on Spatial Data Quality) from 28 to 30 September 2015 in La Grande Motte, France. Tobias had an excellent talk about uncertainties of completeness measures in OpenStreetMap – A case study for buildings in a medium-sized German city.…

  • Twitter as an indicator for whereabouts of people? Correlating Twitter with UK census data

    Detailed knowledge regarding the whereabouts of people and their social activities in urban areas with high spatial and temporal resolution is still widely unexplored. Thus, the spatiotemporal analysis of Location Based Social Networks (LBSN) has great potential regarding the ability to sense spatial processes and to gain knowledge about urban dynamics, especially with respect to…

  • Best Paper at ACM SIGSPATIAL GeoCrowd Workshop for our paper on Transport Flow Analysis from Social Media Data

    Our paper titled “Explorative Public Transport Flow Analysis from Uncertain Social Media Data” in the GeoCrowd 2014 workshop of the ACM SIGSPATIAL conference has been selected by the workshop organizers as its best paper. In this paper, we propose a framework to detect human mobility transportation hubs and infer public transport flows from unstructured georeferenced…

  • Recent Progress in Automated Cartography at German Cartographers Day at INTERGEO

    The German Cartographers Day (Deutscher Kartographentag) is taking place at INTERGEO conference held in Stuttgart this week. We will present an update on recent progress in automated cartography in a talk by Andreas Reimer and Maxim Rylov about our latest improvements in automated label placement, which have been implemented in MapSurfer.NET as published as in OpenMapSurfer.uni-hd.de.…

  • Program of our ISSDQ session on “Quality analysis of Volunteered Geographic Information (VGI) towards effective use” is online

    The program of our special session SS1 on “Quality analysis of Volunteered Geographic Information (VGI) towards effective use” at the 9th International Symposium on Spatial Data Quality (ISSDQ 2015) has been published online. ISSDQ is an event at the ISPRS Geospatial Week 2015 in Montpellier – La Grande Motte, France. The session is scheduled on…

  • Quality Evaluation of OSM with Authoritative Data — a study of Land Use in Southern Germany

    Volunteered Geographic Information (VGI) such as data derived from the OpenStreetMap (OSM) project is a popular data source for freely available geographic data. There is frequently a cause of concern regarding the quality and usability of such data. In addition to our former studies (further here) or complementing our OSM in GIScience Book in a…

  • IJGIS Review for OpenStreetMap in GIScience Book

    The International Journal of Geographical Information Science (IJGIS) published a first review by Wen Lin at Taylor & Francis Online (DOI: 10.1080/13658816.2015.1077965) about our Springer book on OpenStreetMap in GIScience: experiences, research and applications, edited by Jamal Jokar Arsanjani, Alexander Zipf, Peter Mooney and Marco Helbich (2015, Springer Series: Lecture Notes in Geoinformation and Cartography,…

  • A Conceptual Quality Framework for Volunteered Geographic Information (VGI)

    The assessment of the quality of volunteered geographic information (VGI) is cornerstone to understand the fitness for purpose of VGI in many application domains. Most analyses focus on the geometric and positional quality, and only sporadic attention has been devoted to the interpretation of the data, i.e., the communication process through which consumers try to…

  • How to find the fastest way out of a dense human crowd using your smartphone?

    In our research “Routing in Dense Human Crowds Using Smartphone Movement Data and Optical Aerial Imagery“, we propose a navigation approach for smartphones that enables visitors of major events to avoid crowded areas or narrow streets and to navigate out of dense crowds quickly. Two types of sensor data are integrated. Real-time optical images acquired…

  • An Advanced Systematic Literature Review on Spatiotemporal Analyses of Twitter Data

    Recently an Advanced Systematic Literature Review on Spatiotemporal Analyses of Twitter Data has been conducted and the results have been published online as journal article. This article presents a systematic literature review on the state of research concerning methodologies, applications and use cases of Twitter as a Location-Based Social Network. The proposed systematic literature review…