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OSM HOT SBTF 2013_03_16
OpenStreetMap is a collaborative project to create a free editable map of the world. It began in 2004 and now has over 1 million users contributing data. The Humanitarian OpenStreetMap Team contributes mapping data for humanitarian and development contexts. OpenStreetMap data can be used for routing, downloaded for use in other projects, and edited in apps or through the website. Analysis has shown the positional accuracy of OpenStreetMap data is around 6 meters where there is significant contributor activity and quality assurance.
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OSM HOT SBTF 2013_03_16
- 1. Openstreetmap and the HumanitarianOpenstreetmap Team Stand By Task Force – 17 March 2013
- 2. OpenStreetMap A web projectto create a free and open map of the entire world, built entirely from volunteers surveying with GPS, digitizing aerial imagery, collecting and liberating existing public sources of geographic data. = +
- 3. History and stats 2004 : Start of OSM 2012 : Users : + 1,000,000 Nodes : + 1,800,000,000 Ways : + 170,000,000
- 4. Community : Stateof the Map
- 5. Community : MappingParties
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- 10. Governance The ecosystem ofthe OSM community Citizens Associations Local governments NGOs International Organizations (UN, WB) Academia Private actors: • Google, Microsoft, Foursquare • AND • Cloudmade, Geofabrik, Camptocamp & DevelopmentSeeds The growth of the OSM project is fostered by • OpenStreetMap Foundation & local Chapters (France, Spain) • Humanitarian OpenStreetMap Team (HOT) Hum/Dev contexts
- 11. Contributing : Tracingover imagery Free, purchased, negociated
- 12. Contributing : Survey
- 13. Contributing : Data imports: Public Domain
- 14. Data primitives Node: basic element Latitude & longitude Used for POIs Way : ordered interconnection of nodes Used for linear features Closed Way : first and last nodes of the way identical Used for areas Relation : group of any primitives with associated roles Used for relationships between objects and abstract objects
- 15. Tags/attributes • Tagging systemfully flexible • Strongly recommended to use the already existing, debated, approved and described tags so that the OSM data remains consolidated as much as possible. • Wiki : http://wiki.openstreetmap.org/wiki/Map_Features
- 16. Web maps :ITO http://www.itoworld.com/map/main
- 17. Walking Papers http://walking-papers.org/ • Combined, GPS and Walking Papers can be used for rapid surveying and ground truthing. • Walking Papers allow users to print out small sections of the OSM map. In the field, these paper maps can be used to draw new features, annotate existing data, and take notes that will help with the import of GPS data. • Icons in each of the corners and a unique code for each Walking Paper let users scan the paper and upload to OSM so the notes can be viewed in an editing environment.
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- 21. Uses Downloading OSM data http://download.geofabrik.de
- 22. Uses HOT Export Tool http://hot-export.geofabrik.de
- 23. Documentation : Flossmanual http://www.flossmanuals.net/openstreetmap
- 24. Documentation : Learnosm.org http://www.learnosm.org
- 25. Documentation : mapping checklist
- 26. Quality Muki Haklay (UCL) : positionning accuracy • United Kingdom: OSM - Ordnance Survey Meridian II database • Haiti: OSM - GoogleMapMaker - MINUSTAH/CNIGS The analysis shows that, where OSM was collected by several users and benefited from some quality assurance, the quality of the data is comparable and can be fit for many applications. The positional accuracy is about 6 metres, which is expected for the data collection methods that are used in OSM. The comparison of motorways shows about 80% overlap between OSM and OS .