


default search action
"Geo-reCAPTCHA: Crowdsourcing large amounts of geographic information from ..."
Florian Hillen, Bernhard Höfle (2015)
- Florian Hillen, Bernhard Höfle
:
Geo-reCAPTCHA: Crowdsourcing large amounts of geographic information from earth observation data. Int. J. Appl. Earth Obs. Geoinformation 40: 29-38 (2015)

manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.