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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
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