GIScience Logo
HeiGIT Logo
3DGeo Logo

GIScience Blog

Tag: data quality

  • OQT for Food Environments

    OQT for Food Environments

    HeiGIT and the Amsterdam University Medical Centers (UMC) partnered up to investigate food environments through the lens of OpenStreetMap (OSM) data. UMC analyses how exposure to different categories of food related retailers affects health matters. The assumption is that the distance to retailers of a certain category, as well as the number of these retailers,…

  • Exploring the Value of Microsoft ML Roads for OSM Data Quality Analysis

    The completeness of the OpenStreetMap (OSM) road network has been an ongoing focus for researchers for more than 15 years. For instance, Neis et al. (2011) investigated the OSM street network evolution in Germany and compared it against road data from TomTom. Whereas obtaining reference data has been rather difficult in the past, nowadays we…

  • Bachelor’s thesis: Using OSM for location analyses of residential real estate projects – an extrinsic analysis of data quality

    In his bachelor’s thesis, supervised by HeiGIT’s apl. Prof. Dr. Sven Lautenbach, Lars Reckhaus examined the suitability of OpenStreetMap (OSM) for location analyses in the context of residential real estate projects. Typically, such analyses require the use of a variety of data sources and are mostly performed manually. For this reason, they tend to be…

  • Assessing road criticality and loss of healthcare accessibility during floods: the case of Cyclone Idai, Mozambique 2019

    Featured Image: Road network analysis for the driving profiles. A Normal conditions before the flood event. B Evolution of scores after the floods induced by Cyclone Idai. The lower row shows a close-up of the area surrounding the city of Dondo The ability of disaster response, preparedness, and mitigation efforts to assess the loss of physical access to health…

  • New feature addition to Ohsome Quality analysT: Building Completeness Indicator

    Introduction Since the release of the ohsome quality analyst (short OQT) in February of last year, we have been working on developing an accessible yet powerful toolkit which provides end users insights on the quality of OpenStreetMap (OSM) data. An overview of the functionality additions made to OQT over this period of time can be found…

  • Recent feature additions to Ohsome Quality analysT

    Introduction Since the release of the ohsome quality analyst (short OQT) in February of last year, we have been working on developing an accessible yet powerful toolkit which provides end users insights on the quality of OpenStreetMap (OSM) data. An overview of the functionality additions made to OQT over this time period can be found…

  • ohsome quality analyst (OQT) auf der FOSSGIS Konferenz am 09.03.22

    Vom 9. bis zum 12. März 2022 findet die jährliche FOSSGIS Konferenz statt, die führende Konferenz für Freie und Open Source Software für Geoinformationssysteme und Open Data im deutschsprachigen Raum. HeiGIT wird dabei am 09.03. um 16:30–16:50 Bühne 2 ONLINE mit einem Vortrag vertreten sein zum Thema: “ohsome quality analyst (OQT): Die Qualität von OpenStreetMap…

  • United Nations World Data Forum Blog on Healthcare Accessibility Map

    In the context of the United Nations World Data Forum 2021 organised by the United Nations Statistics Division and UN member states a series of blogposts has been published by UNSTATS. Among them is one by Alexander Zipf about improving access to healthcare facilities through geoinformation and crowdsourcing. He introduces the Open Healthcare Access Map…

  • FOSS4G 2021 Videos with HeiGIT contributions online – OSM data quality and MapSwipe

    Recently videos with our contributions by HeiGIT to the FOSS4G conference were put online. Did you miss the event? Now you can watch whenever you like 🙂 Benni by HeiGIT explains who to use the ohsome.org framework to develop an OSM Confidence Index to support humanitarian mapping https://www.youtube.com/watch?v=DWkISL4qbME FOSS4G 2021 Using the ohsome framework to…

  • HeiGIT and MapAction at FOSS4G 2021: Using the ohsome quality analyst to support humanitarian mapping

    Last week, the annual conference FOSS4G (Free and Open Source Software for Geospatial) has been taken place online. The conference is organized by The Open Source Geospatial Foundation (OSGeo) and attracts over 1000 developers, users, decision-makers and observers from a broad spectrum of organizations and fields of operation each year. HeiGIT and MapAction contributed a…

  • Analysing the Impact of Large Data Imports in OpenStreetMap

    OpenStreetMap (OSM) is a global mapping project which generates free geographical information through a community of volunteers. OSM is used in a variety of applications and for research purposes. However, it is also possible to import external data sets to OpenStreetMap. The opinions about these data imports are divergent among researchers and contributors, and the…

  • OSM data quality analysis for different stages of the mapping process

    Slums are an important operational area for humanitarian organisations: Because of provisional housing, poor sanitation and difficult socio-political circumstances offers of help from such organisations are important and often necessary. For such deployments, humanitarian actors rely heavily on Volunteered Geographic Information (VGI), as official maps and data are often incomplete. This makes it all the…