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 classic literature ?
Dey knows I kin wipe up deh street wid any t'ree of dem."
don't tell me nothin' of dem Lincons!"--and Aunt Chloe tossed her head as one who hoped she did know something of the world.
Why, I shouldn't sleep a wink for a week, if I had a batch of pies like dem ar.
Now, Missis, she wanted me to do dis way, and she wanted me to do dat way; and, finally, I got kinder sarcy, and, says I, `Now, Missis, do jist look at dem beautiful white hands o' yourn with long fingers, and all a sparkling with rings, like my white lilies when de dew 's on 'em; and look at my great black stumpin hands.
This week DEM issued an NOV to Sprague Operating Resources LLC for alleged violations of Rhode Island's Code of Regulations titled Odors, which prohibits the release of any air contaminant that creates an objectionable odor beyond the owner's property line.
One of his popular lines is; 'what are friends for if not for inconveniences.' But of all his crowd-favoured programmes, dem say dem say remains the biggest hit.
Clinton actually does dip her toe yet again into the Dem prez race, any bets on whose house she visits first?
"A coalition of anti-Plaid voters has thus been a big part of Lib Dem support in Ceredigion."
Derived results show higher uncertainty in topographical attributes (aspect and slope) derived from the ASTER DEM than from the SRTM DEM.
"We believe that our partnership with CADFEM India will offer strong knowledge of DEM simulation technologies and outstanding support.
jason.beattie@mirror.co.uk outcome 1: tory majority Labour fails to take many seats off the Tories in England and Wales as Conservatives rout Lib Dems in the South West.
But at the Lib Dem conference, the simple fact that the energy secretary backs a policy is no guarantee that it will make it into the manifesto.