Land grabbing is the large scale acquisition or leasing of lands in developing countries for purposes such as biofuel production. The amount of actual land available is often over estimated and can lead to displacement of the local population, affecting food security and local livelihoods. Ethiopia is an example of a country where land grabbing is happening now. One of the most important factors in determining the probability of being a target country for these acquisitions is the perceived availability of land. To halt land grabbing in Ethiopia, we need a better estimate of true land availability. That's why volunteers help was needed.
The Geo-Wiki put forth a challenge for volunteers to help stop land grabbing in Ethiopia. Using a version of Geo-Wiki located at hackathon.geo-wiki.org, volunteers were asked to identify areas of cultivation and settlements using Google Earth imagery. Together the volunteers collected more than 50,000 points, which represents more than 5% of the area of Ethiopia.
During the USAID Hackathon we have collected more than 4,000 points but our goal was 50,000 validation points. Therefore we continued the hackathon until the 6th of October 2012. In total more than 70,000 points were validated. Around 80% of the validated pixels were supplied by the top tree of the 32 hackathon participants, having a medium to high confidence. Of the more than 77,000 pixels assessed, 308 were only assessed once; the remaining pixels were examined by up to 30 participants. The top validators include:
|1||Ujjal Deka Baruah||Gauhati University, Guwahati, Assam, India|
|2||Nitashree Mili||Dibrugarh University, Assam, India|
|3||Npendra Ram||B. Borooah College, Guwahati, Assam, India|
Further, we did a hackathon for organisations during the IIASA conference taking place form 24th to 26th of October 2012. The winning organisation was the Department of Geography, B. Borooah College, Guwahati, Assam, India.
Here we present some first results on settlements and cultivation:
Last edited: 25 January 2013
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