Digital elevation models in topography
Advanced rise displaying
The advanced rise model (DEM) is a raster-based computerized dataset of the geography (hypsometry and/or bathymetry) of all or part of the Earth (or a telluric planet). The pixels of the dataset are each allocated a rise esteem, and a header part of the dataset characterizes the territory of scope, the units every pixel covers, and the units of height (and the zero-point). DEMs might be gotten from existing paper maps and review information, or they might be produced from new satellite or other remotely detected radar or sonar information.
