Natural Earth III – Extra DataAbout the data Terrestrial elevation data – downsampled SRTM30 Plus with filled oceans. The large 10,800 x 5,400 grayscale DEM is very detailed. For creating more legible terrain on Natural Earth III texture maps, use the smaller 8,640 x 4,320 DEM. The large 16,200 x 8,100 bump map derives from the 8,640 x 4,320 DEM. Land/water mask – from Natural Earth II. Water bodies derive from downsampled MOD
