Everything you need to know about Digital Elevation Models …
https://up42.com/blog/everything-you-need-to-know-about-digital-elevation-models-dem-digital
WEBWhat are digital elevation models (DEM)? A Digital Elevation Model, also known as a DEM, is a type of raster GIS layer. They are raster grids of the Earth’s surface referenced to the vertical datum —the surface of zero elevation to which heights are referred to by scientists, insurers, and geodesists.
DA: 11 PA: 89 MOZ Rank: 100