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OSM/HOT training session introduction for the Stand By T
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Openstreetmap and the Humanitarian Openstreetmap
Team
Stand By Task Force – 17 March 2013
OpenStreetMap
A web project to 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.
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History and stats
2004 : Start of OSM2012 :Users : + 1,000,000Nodes : + 1,800,000,000Ways : + 170,000,000
Community : State of the Map
Community : Mapping Parties
Wiki
Mailing lists
IRC
Forum
Governance
The ecosystem of the OSM community CitizensAssociations
Local governments
NGOsInternational Organizations (UN, WB)AcademiaPrivate 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
Contributing : Tracing over imageryFree, purchased, negociated
Contributing :Survey
Contributing :Data imports : Public Domain
Data primitivesNode : basic elementLatitude & longitudeUsed for POIs
Way : ordered interconnection of nodesUsed for linear features
Closed Way : first and last nodes of the way identicalUsed for areas
Relation : group of any primitives with associated rolesUsed for relationships between objects and abstract objects
Tags/attributes• Tagging system fully 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
Walking Papershttp://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.
Garmin Maps
Android
OsmandBrowsingRoutingEditing
OsmtrackerSurvey
Documentation : Floss manual
http://www.flossmanuals.net/openstreetmap
Documentation : mapping checklist
QualityMuki 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 .