maapinna kõrgusmudel, maapinna digitaalne kõrgusmudel, maapinna digitaalne reljeefimudel, DTM
a model representing the terrain surface by a collection of digital data, mainly coordinates in three dimensions, x, y, and z, and digitally defined method to interpolate arbitrary terrain heights in between the stored values ..., a surface describing the three dimensional shape of the Earth's bare surface, excluding as possible any other features placed on it
