Tag: data quality
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Analysing semantic associations in VGI data
Volunteered Geographic Information (VGI) such as OpenStreetMap (OSM) can be a rich resource for many applications. Therefor VGI-projects have to mitigate between the requirements of the the volunteers and the machines. On the one hand, the data format should be simple and general in order to make contributing to the project easy for the volunteers.…
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Plausible Parrots – HeiGIT’s OSHDB Supports Research in Citizen Science Data Quality
In the GIScience research group at Heidelberg University, a recent PhD research project by Clemens Jacobs has been looking into the data quality of citizen science observations of organisms. This research aims at using geographic context as an information source for estimating the plausibility of an observation, e.g., of a bird, which was reported to…
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Recommendations for organising better mapping parties with the aim of improving OpenStreetMap and Wheelmap data completeness
Nowadays, several research projects show interest in employing volunteered geographic information (VGI) to improve their systems through using up-to-date and detailed data. The European project CAP4Access was one of the successful examples of such international-wide research projects that aimed to improve the accessibility of people with restricted mobility using crowdsourced data. In this project, OpenStreetMap…
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Kick-Off Waterproofing Data project in São Paulo, Brazil
This month we kicked off our new project Waterproofing Data in São Paulo, Brazil together with partners from Warwick University and Brazilian stakeholders such as Cemaden (National Early Warning and Monitoring Centre for Natural Disasters / Centro Nacional de Monitoramento e Alertas de Desastres Naturais) or local Universities, City of São Paulo, Fundacao Getulio Varga etc. We…
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A grounding-based ontology of data quality measures
Data quality and fitness for purpose can be assessed by data quality measures. Existing ontologies of data quality dimensions reflect, among others, which aspects of data quality are assessed and the mechanisms that lead to poor data quality. An understanding of which source of information is used to judge about data quality and fitness for…
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EuroGEOSS Workshop: Crowdsourcing Land Use Map Validation
At the recent EuroGEOSS Workshop in Geneva, LandSense researchers from IIASA and Heidelberg University hosted an interactive mapping session to showcase the power of crowdsourcing for map validations as announced earlier. Using the openly available Land Cover Validation Platform (LACO-Wiki), participants collaboratively validated a land use and land cover map of Geneva, which brings together data…
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7th International Conference on Cartography & GIS
The 7th International Conference on Cartography & GIS took place at Sozopol (Bulgaria) 18-23 June 2018. It was organized by Bulgarian Cartographic Association, International Cartographic Association and University of Architecture, Civil Engineering and Geodesy (UACEG), Sofia and co-organizers – Military Geographic Service, Bulgaria, and Bulgarian Red Cross. The main topics of the conference were: GIS…
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Join the OSMlanduse.org Sentinel-2 Fusion Validation Mapathon @ EuroGEOSS Workshop
Join us on Thursday 13th September 2018 at the EuroGEOSS Workshop in Geneva for the validation mapathon of OSMlanduse.org Sentinel-2 landuse fusion map. Have an exclusive first peek at the EU wide OSMlanduse Sentinel-2 landuse fusion map, a result of millions of OSM contributions and the Sentinel-2 archive remote sensing data. The event is a prequel…
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Today & tomorrow GIScience Heidelberg Talks in Africa and Australia
This Wednesday and Thursday we have presentations from the GIScience research group Heidelberg on two remote contintents – both in Africa and in Australia: On Wednesday: First down under at GIScience Melbourne in Australia Rene Westerholt will present the work related to our PLATIAL18 workshop: Westerholt, R., Gröbe, M., Zipf, A. and Burghardt, D. (2018): Towards the statistical…
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AGIT30 was ohsome (and awesome)
Members of the HeiGIT team were presenting parts of our work at this years AGIT/GI_Forum conference in Salzburg, Austria (as already announced in a previous blogpost). Julian Bruns was presenting the results of a joint work with the KIT and his old employer, the FZI, which is published in the GI-Forum journal (English conference running in parallel to the…
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A new infrastructure for exploring and analyzing OpenStreetMap
Ever wondered how you can generate/use some meta-information about OpenStreetMap for your project? Are you interested in visualizing different aspects of OpenStreetMap data? In the article below, we present a server infrastructure to collect and process data about different aspects of OpenStreetMap. The resulting data are offered publicly in a common container format, which fosters…