digital elevation model


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digital elevation model

A digital map of the elevation of an area on the earth. The data are either collected by a private party or purchased from an organization such as the U.S. Geological Survey (USGS) that has already undertaken the exploration of the area. Digital elevation models are gray scale images wherein the pixel values are actually elevation numbers. The pixels are also coordinated to world space (longitude and latitude), and each pixel represents some variable amount of that space (foot, meter, mile, etc.) depending on the purpose of the model and land area involved. See remote sensing and GIS glossary.


Sample Digital Elevation Model Rendering
This scene was rendered from a USGS digital elevation model of the Grand Canyon by the RiverTools application from Rivix, LLC, Broomfield, CO (www.rivix.com). RiverTools was written in IDL, a programming language from Research Systems, Inc. that is specialized for image processing and visualization. The black area is the Colorado River at the bottom of the canyon. The red is the immediate surrounding riverbank. (Image courtesy of Research Systems, Inc. and Rivix, LLC.)
References in periodicals archive ?
River reach length and slope estimates for large-scale hydrological models based on relatively high-resolution digital elevation model.
Figure 4a shows the flowpaths used in this analysis extracted from a 10 m (33 ft) digital elevation model for a small agriculture based watershed near Watertown, South Dakota.
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9 yd) digital elevation model is a smoother representation of the topography, and data generated from the digital elevation models will be at a more appropriate scale for soil mapping.
Contract award notice: q / u2cd / ea267 / da204 realizing the digital elevation model of the bundeswehr (dhmbw).
Contract notice: Provision Of Digital Color Orthophotography, Oblique Aerial Photos, Digital Elevation Model) (Mnt, A Digital Elevation Model Dem () And Contour Lines On The Territory Of The Urban Community Of Greater Nancy
Airbus Defence and Space and the German Ministry of Defence have signed a contract for the utilisation of TanDEM-X mission data, to update the Digital Elevation Model (DEM) of the Bundeswehr.
Tenders are invited for Photogrammetric Block using Cartosat-1 Stereo Pairs of Odisha, Digital Elevation Model (DEM), Slope, Contour, Ortho Image,Ortho-rectification of Resoucesat-2 LISS-IV & Resolution Merging of Cartosat-1 PAN & MX to generate FCC and NCC of the State and Mosaicking of DEM, Slope, Contour, PAN, MX,FCC and NCC to generate seamless State mosaic of each one.
Acquisition and digital processing of topographic height information by means of laser scanning technology for the comprehensive construction of a high-precision digital elevation model for the Land Nordrhein-Westfalen.
Prior information notice without call for competition: Precommercial purchase (PCP) of R & D services for area-wide digital elevation models in coastal areas (Digital Elevation Model or Coastal Areas DEMCA) using an innovative sensor platform

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