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About License New Custom Download: Code[Unix|DOS]|Data
Maps: Demo Globe World Region Country State: US|CA|AU

Land Mask
Landmask2 example map 1 Landmask2 example map 2 Landmask2 example map 3
landmask • This is the 16K land/water mask from Natural Earth III by Tom Patterson. The original image is a 4.7 MB, 16,200 x 8,100 PNG, converted here to a 2.4 MB, 4-bit grayscale GIF. Lower resolution versions (5', 10', 15' and 30') are also available as datasets lmask5 etc for use in masking (cell value 0-255 is land coverage 0-100%).

See the data page for unpacking instructions.

Dataset  Res   Size bz2   Size un 
landmask.tar 80" 2.4 MB
lmask5.tar.bz2 5' 652 KB 8.9 MB
lmask10.tar.bz2 10' 236 KB 2.2 MB
lmask15.tar.bz2 15' 129 KB 1.0 MB
lmask30.tar.bz2 30' 45 KB 260 KB