For more perspective here's a photo of the village - which appears to be more of a camp: http://explore.org/photos/1725/gereida-sudan-village http://explore.or

For more perspective here's a photo of the village - which appears to be more of a camp: http://explore.org/photos/1725/gereida-sudan-village http://explore.org/photos/1725/gereida-sudan-village In the satellite image I think it's safe to assume each white block is a tent and each dark outline is a fence. There are many dark outlines with no tents showing where the old population has moved out. The wikipedia article explains the sudden changes in population of the settlement. It would probably explain the grid layout too. https://en.wikipedia.org/wiki/Gereida https://en.wikipedia.org/wiki/Gereida