type=continuous signed=yes projection=regular_ll dx=0.015625 dy=0.015625 known_x = 1. known_y = 1. known_lat = -90. known_lon = -180. wordsize=2 tile_x=11520 tile_y=11520 tile_z=1 tile_bdr=0 units="meters" description="SHARAD paleotopography"