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GIScience Blog

Tag: Quality

  • OSMlanduse European Union validation effort EuroSDR conference 11/24/2020

    During the EuroSDR workshop we will present our OSMlanduse product (earlier post) to the land use (LU) and land cover community (LC) and highlight class accuracies and a benchmark comparison towards existing national authoritative products. Accuracy estimated to be presented are based on more than 7k reference points collected in the past month through a…

  • OSMlanduse European Union validation effort

    We launched a validation campaign of our new 10meter resolution OSMlanduse product for the member states of the European Union. Please contribute to the validation here. A technique where contributions are checked against each other is implemented to promote quality of information. The mapathon comes in four themes: nature, urban, agriculture or expert. While the expert…

  • Healthsites and HeiGIT establish partnership

    The Global Healthsites Mapping Project (Healthsites) and the Heidelberg Institute for Geoinformation Technology/ GIScience Research Group are happy to announce the now also formal cooperation. Last week, HeiGIT/ GISciences signed the Healthsites Memorandum of Understanding (MoU) to strengthen their strategic partnership with the main aim to support the analyses, sharing and use of baseline OpenStreetMap…

  • Keynote at DLR.Open OpenGeoData Open Data Science Workshop

    Today Prof. Alexander Zipf is giving an invited keynote speech at the German Aerospace Center (DLR) in Oberpfaffenhofen, the national aeronautics and space research centre of the Federal Republic of Germany. The DLR organises a two day workshop called “DLR.Open II – Open Data Science und Open Geodata“. This is the second workshop on Open…

  • Are Crowdsourced Datasets Suitable for Specialized Routing Services? Case Study of OpenStreetMap for Routing of People with Limited Mobility

    Using data generated from the crowd has become a hot topic for several application domains including transportation. However, there are concerns regarding the quality of such datasets. As one of the most important crowdsourced mapping platforms, in a recent study (1) we analyze the fitness for use of OpenStreetMap (OSM) database for routing and navigation…

  • Paper on OSMlanduse.org at AGIT

    The programme of the AGIT Symposium 2017 in Salzburg is online now and it includes a first paper about the work at GIScience Heidelberg on OSMlanduse.org. It will be presented 6 July in the afternoon at AGIT Salzburg. The talk is entitled “OSMLanduse Version 1” while the full titel of the paper is: Voß, J.,…

  • LandSense Stakeholder workshop 25.-26.01.2017

    During last weeks LandSense stakeholder at IIASA workshops various tools relevant for VGI data capture, Quality assessment and beyond were discussed. Potential hotshots for validation and improvement of OSMLanduse were FotoQuest and LacoWiki. Also discussed were platforms for hobby bird fans or for spatial data geeks. http://www.geog.uni-heidelberg.de/gis/land_sense.html http://osmlanduse.org

  • Why is it routing this way?

    When using routing services that rely on OpenStreetMap data, the route engine might suggest you a path that seems to be longer than the shortest possible route you could identify on the map. The main reason behind this are either a lack of data completeness in OSM (for certain data attributes/ for certain regions) or…

  • Intrinsic quality assessment of building footprints data on OpenStreetMap

    Recently some of our work on intrinsic VGI quality analysis has been published. In this work we propose a framework to assess the quality of OSM building footprints data without using any reference data. More specifically, the OSM history data will be examined regarding the development of attributes, geometries and positions of building footprints. In…

  • European COST action IC1203 reports about our work in CAP4Access project

    COST action IC1203 is a European Network Exploring Research into Geospatial Information Crowdsourcing: software and methodologies for harnessing geographic information from the crowd (ENERGIC). The action has been greatly active in the past 3 years and is now delivering the results via their website as well as their Youtube channel. One of the outputs of this…

  • LandSense Kick-Off Meeting – EU Citizen Science Observatory on Landuse

    this week sees the Kick-Off Meeting of a new EU Horizon 2020 project called LandSense at International Institute for Applied Systems Analysis (IASA) Laxemburg Austria. The overall aim of the LandSense project is to build an innovative citizen observatory in the field of LandUse LandCover (LULC), which collects data both actively (through citizens) and passively…

  • Talk on Mapping the Crowd at Spatial Cognition Colloquium by A. Zipf and PhD of Ahmed Loai Ali

    today Dr. Ahmed Loai Ali successfully defended his Phd on “Enhancing Data Classification Quality of Volunteered Geographic Information” at Bremen Spatial Cognition Center with Prof. Freksa (Bremen) as first and Prof. Zipf (Heidelberg) as second reviewer. We congratulate Ahmed to his good results! The groups collaborated also earlier (see ref. below) and Ahmed Loai Ali…