Geo-Wiki

Geo-Wiki is a project founded in 2009 by the project partners the International Institute for Applied Systems Analysis, University of Applied Sciences Wiener Neustadt and University of Freiburg. The Geo-Wiki Project is a global network of volunteers who wish to help improve the quality of global land cover maps. Volunteers are asked to review hotspot maps of global land cover disagreement and determine, based on what they actually see in Google Earth and their local knowledge, if the land cover maps are correct or incorrect. Their input is recorded in a database, along with uploaded photos, to be used in the future for the creation of a new and improved global land cover map.

Website: http://geo-wiki.org/