3D computer-generated imagery and measurements of terrain
3D rendering of a DEM of Tithonium Chasma on Mars
A digital elevation model (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent terrain or overlaying objects, commonly of a planet, moon, or asteroid. A "global DEM" refers to a discrete global grid. DEMs are used often in geographic information systems (GIS), and are the most common basis for digitally produced relief maps.
A digital terrain model (DTM) represents specifically the ground surface while DEM and DSM may represent tree top canopy or building roofs.
While a DSM may be useful for landscape modeling, city modeling and visualization applications, a DTM is often required for flood or drainage modeling, land-use studies,[1] geological applications, and other applications,[2] and in planetary science.
^I. Balenovic, H. Marjanovic, D. Vuletic, etc. Quality assessment of high density digital surface model over different land cover classes. PERIODICUM BIOLOGORUM. VOL. 117, No 4, 459–470, 2015.
^"Appendix A – Glossary and Acronyms" (PDF). Severn Tidal Tributaries Catchment Flood Management Plan – Scoping Stage. UK: Environment Agency. Archived from the original (PDF) on 2007-07-10.
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A digitalelevationmodel (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent terrain or overlaying...
after 1 April 2008 has been marked as unusable. The ASTER Global DigitalElevationModel (GDEM) is available at no charge to users worldwide via electronic...
Digital Terrain Elevation Data) is a standard of digital datasets which consists of a matrix of terrain elevation values, i.e., a DigitalElevation Model...
The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the...
Satellite RADAR mapping is one of the major techniques of generating DigitalElevationModels (see below). Similar techniques are applied in bathymetric surveys...
800 km north of Giza. In 2003, a new calculation based on a global digitalelevationmodel obtained from satellite measurements, ETOPO2, whose data points...
widespread use. Computerized methods for watershed delineation use digitalelevationmodels (DEMs), datasets that represent the height of the Earth's land...
bathymetric models in shallow water. The main constituents of airborne lidar include digitalelevationmodels (DEM) and digital surface models (DSM). The...
The digitalelevationmodel, consisting of surface elevations recorded on a 30-meter horizontal grid, shows high elevations as white and low elevation as...
Raster Product Format) USGS DEM – The USGS' DigitalElevationModel GTOPO30 – Large complete Earth elevationmodel at 30 arc seconds, delivered in the USGS...
that obtained digitalelevationmodels on a near-global scale from 56°S to 60°N,: 4820 to generate the most complete high-resolution digital topographic...
specific landforms. A digitalelevationmodel (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent...
mainly as Discrete Global Grid in secondary elevationmodeling. Each pixel stores values, such as surface elevation data, for display in 3D computer graphics...
the area between so scale may not be uniform across the image. A digitalelevationmodel (DEM) is required to create an accurate orthophoto as distortions...
often called a digitalelevationmodel (DEM), which can be further used to produce digital surface models (DSM) or digital terrain models (DTM). An advantage...
particularly important in geostatistics, where it is used to create a digitalelevationmodel from a set of points on the Earth's surface (for example, spot...
borders the district of Kinnaur in the south and is dominated by Jorkanden (elevation- 6473m) peaks. Jorkanden is the highest peak in the Kinner-Kailash range...
the United States Geological Survey for storing a raster-based digitalelevationmodel. It is an open standard, and is used throughout the world. It has...
GTOPO30 is a digitalelevationmodel for the world, developed by United States Geological Survey (USGS). It has a 30-arc second resolution (approximately...
conducted a topographical analysis of Yonaguni Island using a digitalelevationmodel and geological field investigations of the strata, rocks, and microtopography...
vector source for topography data, often rasterized as a (raster) digitalelevationmodel. Display list Michael F. Worboys (30 October 1995). GIS: A Computer...
software package allows the creation of orthophoto mosaics and digitalelevationmodel (DEM). Some services the company offers include: Orthophotos are...
valleys, etc.) are called oronyms. Landforms may be extracted from a digitalelevationmodel (DEM) using some automated techniques where the data has been gathered...
The National Elevation Dataset (NED) consists of high precision topography or ground surface elevation data (digitalelevationmodel) for the United States...
terrain can be represented using a regular grid of points called DigitalElevationModel (DEM). Where each point of the DEM is represented by its coordinates...
stream networks, landforms etc.) using input digital land surface model (also known as digitalelevationmodel, DEM) and parameterization software. Extracted...
surface network modeling to a digitalelevationmodel to find exact or approximate key cols. Since topographic maps typically show elevation using contour...
are one of the sources used to make digitalelevationmodel of the terrain. They are also used to generate 3D models of urban environments. Drones are often...
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