OpenStreetMap

Mapper

Cultural Data

Open Data

Dennis

OpenStreetMap?

2004

OpenStreetMap

GPS

Walking Paper

Walking Paper

OpenStreetMap

http://walkingpapers.org

CC-BY-SA 2.0+ Kachkaev http://wiki.openstreetmap.org/wiki/File:Surveying_with_walking_papers.jpg

CC-BY-SA 2.0+ Mark gray http://wiki.openstreetmap.org/wiki/File:Walking-papers.scan-example.jpg

1047814011

ex: