2 contributing
DESCRIPTION
TRANSCRIPT
ICRC GIS officers - 24/08/2010Frédéric [email protected]
OpenstreetmapContributing
Data sources
GPS
● Historical source of data● Especially useful in rural areas● Allow WMS layer rectification● The more we get tracks, the more the map will
be accurate.
Aerial imagery
● Easy tracing of linear and area features
● Imagery currently used :● Yahoo (big cities)● Landsat● Special cases : Haiti, Gaza, Kyrgyzstan, Pakistan...
Imports
● PGS coastlines● CIA World Databank boundaries● AND donated data in the Netherlands● TIGER data in the USA● etc
Other maps
● Compliant license needed (PD)● Example : CIA maps
→ Perry-Castañeda Library Map Collection
http://www.lib.utexas.edu/maps/
Local knowledge
● Most valuable source of data● accurate● up-to-date● many details (street names, POIs...)
● But also most difficult to find● contributions mainly in Europe and urban areas● areas without data are often where technology is
the less spread
Softwares
JOSM
● Powerful Java desktop editor● WMS integration● Data quality checks● Plugins to add tools● Custom preset attributes
JOSM
Potlatch
● Flash online editor● WMS integration● Easy editing● Difficult to handle large amount of data
Potlatch
Potlatch 2
● Future live OSM editor● Written in Flash● Easily configurable and deployable
Potlatch2
Custom Potlatch2
Simple Map Editor (GSoC 2010)
Walking Papers
● Take notes on existing map● Automatic orthorectification● Edition on top of the annotated map
→ Everyone can participate
→ http://walking-papers.org/
Take notes
JOSM editing
Before/After
Data quality
Geometry and tagging control
Geometry and tagging control
Mapping completeness