digital terrain model. (n) A 3-D computer model of a land form generated from survey data. Such models are often used by civil engineers and land planners to explore possible placements of structures or changes to the terrain before actual construction begins.
digital terrain model. Digitally encoded information about the elevation (or variation of relief) of a given area. This gives a quantitative model of landform. Often the terms DEM (Digital Elevation Model) and DTM (Digital Terrain Model) are used interchangeably, although many prefer to use the term DEM to describe a model containing only discrete data on elevation.
Digital Terrain Model; synonym for DEM
Digital Terrain Model. Gridded representation of terrain height above sea level.
Digital Terrain Model. Digital Terrain Model is a sample of terrain elevations points used to model a land surface. It is a required element in the processing of digital orthoimagery based on the accurate identification of control points in the images whose ground positions are accurately known.
Digital terrain model. A computer graphics software technique for converting point elevation data into a terrain model displaced as a contour map, sometimes as a three-dimensional "hill and valley" grid view pf the ground surface.5
Digital Terrain Model. A more rigorous 3-D model of the Earth's surface than a DEM. A DTM can be used for accurate contour modeling and can also be used for orthorectification.
Digital Terrain Model; a digital representation of relief. Usually a set of elevation values incorrespondence with a grid cell. (ii) Desk Top Mapping; the inception of simple GIS techniques into normal business computing practices.
Digital Terrain Model. land surface representation in digital form by an elevation grid or list of three-dimensional coordinates.
Digital Terrain Model. A three-dimensional model of the Earth's surface, provided in digital form.
Digital Terrain Model - A digital model of the terrain surface - similar to a DEM but often enhanced by planimetric information.
Digital Terrain Model (USGS)
Elevation data in a 3 x 3 arcsecond grid form or a similar rectilinear form. Also can be referred to as a DEM with other information such as breaklines.
A model of ground-level land surface represented in digital form by an elevation grid or lists of three-dimensional coordinates. E-F H-I L-N O-P S-T U-Z
See digital terrain model.
digital terrain model. a land surface represented in digital form by an elevation grid or lists of three-dimensional coordinates.
Digital Terrain Model. A method of transferring elevation data into a contoured surface or a three-dimensional display.
Digital terrain model. See digital elevation model.
digital terrain model. a Three-dimensional model of digital elevation data (DEM - see previous definition) for cartographic representation. Terrain models are often displayed as grids, superimposed over topography maps to illustrate peaks and valleys.