Category: Publications

Temporal Analysis on Contribution Inequality in OpenStreetMap: A Comparative Study for Four Countries

Contribution inequality widely exists in OpenStreetMap (OSM), which means that most data come from a minority of the contributors, while the majority only accounts for a small percentage of data. This phenomenon is of great importance to understanding from where the data come and how the project evolves. The investigation in a recently published paper…

2016-01-19
3D-WebGIS for Archeology – the example of MayaArch3D

Archaeological projects increasingly collect airborne LiDAR data to use as a remote sensing tool for survey and analysis. Publication possibilities for LiDAR datasets, however, are limited due to the large size and often proprietary nature of the data. Fortunately, web-based, geographic information systems (WebGIS) that can securely manage temporal and spatial data hold great promise…

2015-12-04
Matching OpenStreetMap Road Networks with Authority Data – a Polygon-based Approach

Matching road network is an essential step for data quality assessment by using reference data. Conventionally, road network from two data sets are matched by using line-based approach which checks the similarity of properties of line segments. In new method recently published in IJGIS, a polygon-based approach is proposed to match OpenStreetMap road network with…

2015-11-10
Contributions to the European Handbook on Crowdsourced Geographic Information

The GIScience Research Group at Heidelberg University has contributed several chapters to the forthcoming “European Handbook of Crowdsourced Geographic Information”, edited by Capineri, C. et al. (eds.), Ubiquity Press. This includes the following chapters and papers that have been accepted for publication from different authors of the GIScience Research Group Heidelberg: – Research on social…

2015-10-30
Deadline Extended: Special Issue “Big Data for Urban Informatics and Earth Observation” ISPRS Journal of Geo-Information

The Deadline for the special issue on “Big Data for Urban Informatics and Earth Observation” of the ISPRS Journal of Geo-Information has been extended by April 30, 2016. For further information, please contact the special issue guest-editors for further information. Dr. Jamal Jokar Arsanjani (GIScience Heidelberg) Prof. Ming-Hsiang (Ming) Tsou Guest Editors This Special Issue is…

2015-10-25
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…

2015-10-21
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,…

2015-10-12
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.…

2015-10-01
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…

2015-09-30
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…

2015-09-25
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.…

2015-09-15
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…

2015-09-10