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Presentation 1
General informations on OpenStreetMap

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    1 general 1 general Presentation Transcript

    • Openstreetmap General ICRC GIS officers - 24/08/2010 Frédéric Bonifas fredericbonifas@gmail.com
    • What is Openstreetmap ?
    • Openstreetmap ? ● Collaborative project to create a free and open map of the world ● Database of geographical vector data ● Wiki-style editing = +
    • Why does OSM exist ? ● Most other maps are non-free (eg : hard to get Google MapMaker for Kyrgyzstan) ● Vector data for custom maps is difficult to obtain ● Users can improve the map ● Fast updates ● Commercial maps have intentional errors to prevent copy ● Many areas of the world are mapped poorly ● Specialty maps ● Innovative uses
    • Innovative use ? OSM cake !
    • History ● Aug 2004 : Creation of OpenStreetMap ● March 2006 : OSM on Garmin GPS ● Dec 2006 : tracing over Yahoo aerial imagery allowed ● July 2007 : First international conference (State of the Map) ● 2008 : TIGER import in the US ● July 2010 : OSM used by MapQuest and Bing
    • Technical side
    • 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
    • Attributes ● Attributes for differentiation of each data primitive ● No restriction on tags assigned to elements : use any attributes you want ! ● Frequently used attributes are documented → http://wiki.openstreetmap.org/wiki/Map_Features
    • Map Features
    • Which features ? ● Buildings ● Road signs ● Streets and roads ● Amenities and shops ● Boundaries ● Pedestrian and bicycle ● Landuse ● Hydrography informations ● Public transport
    • Community
    • Who is participating ? ● Citizens and associations ● Private societies ● Google, Yahoo ! ● AND ● Cloudmade, Geofabrik, Camptocamp ● Organizations ● Local governments ● NGOs
    • Important growth 290000 contributors 1,9 billion GPS points 740 million nodes 60 million polylines
    • Mapping parties
    • State of the Map
    • Governance Needs ● Represent the OSM community ● Money and servers management ● Legal aspect Structures ● OpenStreetMap Foundation ● Local chapters ● Humanitarian OpenStreetMap Team