Currently I am taking gps coordinates of oil palm plantations in Africa. I'm putting the waypoints in a GIS program but the free basemap provided isn't always giving high resolution images, making it difficult to adjust the waypoints to the real boundaries of a plantation. On Google Earth you can detect plantations easily. So I was wondering which free imagery is available to detect plantation boundaries/palm trees. Or is there a way to detect oil palm plantations from low resolution imagery (landsat).
http://commodities.globalforestwatch.org/ has a Palm Oil concessions layer under the contextual maps, land use category. Coverage seems limited to Indonesia, Brazil, and Western Africa.