Talk:Digital elevation model

message: DEM is definitely a more broad term than DTM, and is more extensively used in the GIS field.  It would be better to roll DTM into the DEM article. —This unsigned comment was added by 24.68.236.177 18:18, 24 March 2006 (talk • contribs) .
I agree with this comment. The DTM topic should be included in the DEM article and not the other way around. (SCmurky 18:11, 25 May 2006 (UTC)
thread_title:  DTM is a subset of DEM 

message: There had been some discussion about merging at Talk:Digital terrain model. Whitejay251 05:07, 5 June 2006 (UTC)
replies: text: I've roughed in the merge, keeping DTM as a larger concept of which DEM is a subset (see for example the def here; please feel free to clean up. This is not my primary area of expertise, so I've mostly just sorted between the two articles.--Natcase 15:40, 7 December 2006 (UTC)
thread_title: Merge with [[Heightmap]]

message: There's a good image located here: http://www.povray.org/documentation/view/3.6.1/279/
Maybe you could get permission to use it?4.225.106.199 05:57, 6 October 2006 (UTC)
thread_title: Image

message: The article was not reflecting the (unfortunately) manifold different definitions of the terms DSM, DTM and DEM. In fact most of the datasets introduced (ERS, SRTM, ASTER GDEM) are not DEMs like defined before (..of ground surface..). All datasets who use satellites or airplanes as platforms are DSMs. It is possible to create a DTM from a high resolution DSM dataset trough complex algorithm. I hope the article, is now reflecting the different types of definitions.  I know there are other terms like Digital Height Models, Digital Elevation Terrain models, Digital Ground Models, etc., but I think DSM, DTM and DEM are the important onces. MO  — Preceding unsigned comment added by MartinOver (talk • contribs) 20:03, 21 January 2011 (UTC)
thread_title:  Revised the article 

message: Prior to any more modern application of this type of advanced science and engineering to private or non-military governmental, highly accurate topographical, and compositional, information of the earth's surface were used to program flight paths into the inertial guidance computers of ICBMs.  This information was used to accurately predict/assume/infer the value of the Earth's gravitational constant (g) at points of known elevation above the earth's surface along a predefined flightpath... such as the flightpath from the midwestern US, over canada, the arctic, and into Russia.  It is necessary to know both topographical information in fine detail, as well as certain compositional information (eg the density of the terrain) to program these types of guidance systems to ensure a high degree of targeting accuracy.  During the cold war, this information was synthesized from aerial and spaceborne reconnaissance, and even painstaking on-the ground geographical and geological studies.76.126.61.239 (talk) 19:17, 23 November 2015 (UTC)
thread_title:  Uses:  Precision Inertial Guidance of Ballistic Missles 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018) 

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message: The movement is slow to be understood bt fast to be tood 102.85.187.209 (talk) 10:11, 15 September 2023 (UTC)
thread_title:  Generational move