This map shows the digital elevation of a 10' equal angle grid box. To download a copy of this map press here. (This map, due to the larger range of numbers, requires a 2-byte format to store all the information. Like the other maps it begins at the North Pole, and Greenwich Meridian, and is dimensioned 2160x1080 (10' resolution), however it consists of 2-byte integers instead of 1-byte integers like te other maps. Consequently its size is ~4.6Mb.