3. Openstreetmap ?
● Collaborative project to create a free and open
map of the world
● Database of geographical vector data
● Wiki-style editing
= +
4. 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
6. 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
8. 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
9. 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
11. Which features ?
● Buildings
● Road signs
● Streets and roads ● Amenities and shops
● Boundaries
● Pedestrian and bicycle
● Landuse
● Hydrography
informations
● Public transport
17. Governance
Needs
● Represent the OSM community
● Money and servers management
● Legal aspect
Structures
● OpenStreetMap Foundation
● Local chapters
● Humanitarian OpenStreetMap Team