Crowd Sourcing for Updating National Databases
Zweites Symposium "e;From off the record to accredited volunteered GEOinformation"e; gemeinsam von swisstopo – EuroSDR – EuroGeographics
Zweites Symposium "e;From off the record to accredited volunteered GEOinformation"e; gemeinsam von swisstopo – EuroSDR – EuroGeographics