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 ?
EDEMTM is state-of-the-art DEM (Discrete Element Method) modeling software uniquely designed to couple with other CAE tools and user-defined numerical models including fluid dynamics, electrical and magnetic forces, chemical kinetics and rigid body dynamics.
EDINBURGH, Scotland and LEBANON, New Hampshire, January 16 /PRNewswire/ -- DEM Solutions, a global leader in discrete element modeling software and services, has announced a restructuring of its organization as part of an overall expansion designed to better meet the needs and requirements of its growing client base.
Its DEM enables superior interactive and enhanced TV applications in existing digital cable environments.
Its DEM, first launched with Videotron Ltd, enables superior interactive and enhanced TV applications in existing digital cable environments.
John D'Auria, CEO, The DEM Group, agrees that the relationship is a good match, "DEM has the high-tech public relations experience required to help SEDONA stand out in its industry.
Founded four years ago, The DEM Group specializes in helping IT companies with their complete marketing communications needs.
The data collected in this experiment also has shown that the density values are greater in as-cast ductile iron than in heat-treated ductile iron and the DEM decreases in heat treated ductile iron.
The result of 10 years R&D, DEM Solutions' EDEM software enables engineers across a broad spectrum of industries - chemical, pharmaceutical, materials processing, mining, agriculture - to simulate and analyze the behavior of particulate matter (pills, pellets, aggregates etc.
The data used in the analysis are: topographic maps at scale 1:25000, 30 m resolution SPOT-HRS DEM, 30 m resolution ASTER DEM, 90 m resolution SRTM DEM and elevation data collected in the study area with a Leica TPS 400 total station.
Andrew said: "I'"I'm using standard plates and certainly won't be displaying LI6 DEM now
If Lib Dems do not want to defend the indefensible - the Tory deal - then there is only one step they should take - resign and join the only continuing and progressive Liberal Party.
If Chris really wants to show that Lib Dems care about our NHS, he should use his party connections to insist that all Lib Dem MPs vote against Lansley's shameful Health and Social Care Bill.