Examples of Landsat sample blocks characterized to estimate forest cover and change from 2000 to 2005. Each block covers 18.532 km per side and has been reprojected into local Universal Transverse Mercator coordinates. The strata are created by using the biome-wide MODIS 2000 to 2005 forest clearing probability maps. All blocks used in this analysis can be viewed at http://globalmonitoring.sdstate.edu/projects/gfm.

Source: http://www.pnas.org/content/105/27/9439