DTM
Digital Terrain Model. A term which is commonly used interchangeably with DEM. Strictly speaking a DTM refers to a model of reality which includes information relating to factors such as surface texture as well as elevation.
DTM stands for digital terrain model, a method of transforming elevation data into a contoured surface or a three-dimensional display.
DTM: Digital Terrain Model. A method of transferring elevation data into a contoured surface or a three-dimensional display.
DTM-construction (i.e. the collection of data, interpolation/triangulation and filtering) forms the object of the third chapter of the lesson. Students learn how to describe and comment the main sources of information for DTMs critically.
New DTM analysis, design, and editing options
- Performance enhancements for large surfaces
- Triangle filter
- Change triangle face
- Copy multiple portions of surfaces
- Merge multiple portions of surfaces
- Scaling for bathymetric data ...
Drive-by DTM: GPS and GSM power cost-effective terrain modeling; A data teletransmission system for quick and efficient creation of digital terrain...
by Adam Ciecko
Scientists hold volcano watch ...
Creating the DTM
Start ArcView (Look for the icon on the desktop or select it from the Start/Programs/ESRI/ArcView GIS/ArcView GIS) and create a new project with a new view. Do not add data to the view at this moment.
Also referred to as 'digital terrain model' (DTM).
2. An elevation database for elevation data by map sheet from the National Mapping Division of the U.S. Geological Survey (USGS).
3. The format of the USGS digital elevation data sets.
A digital elevation model - also sometimes called a digital terrain model (DTM)[2] - generally refers to a representation of the Earth's surface (or subset of this), excluding features such as vegetation, buildings, bridges, etc.
A digital terrain model (DTM) on the other hand is (generally) a filtered version of this surface, and hence can be a post-processed version of what was originally a DEM.[1] The DTM provides a so-called bare-earth model, devoid of landscape features.
(To view DOD’s policy on use of social media, see DTM-026: Responsible and Effective Use of Internet-based Capabilities.)
Model 2: Control distributed to units of the government or agency.
I have left out many details of how to create a DTM from ASTER DEM data. ASTER data sets represent a rich but decidedly complex source of DEM and overlay imagery for the digital cartographer.
Digital elevation data, frequently termed digital elevation model (DEM) or digital terrain model (DTM), provide elevation information along a contour or at regularly spaced sample points.
digital terrain model or DTM may actually be a more generic term for any digital representation of a topographic surface, but it is not so widely used
the DEM is the simplest form of digital representation of topography and the most common ...
Digital terrain model (DTM) - A topographic surface or computer representation of terrain stored in a digital data file as a set of 3-dimensional (x,y,z) coordinates. The image may be displayed on a computer monitor or portrayed on a map.
Digital Terrain Model (DTM) - A more rigorous 3-D model of the earth's surface than a DEM. A DTM can be used for accurate contour modeling and can also be used for orthorectification.
Digital Terrain Model (DTM) A three-dimensional model of the Earth's surface, provided in digital form. (DTM) A three-dimensional model of the Earth's surface, provided in digital form.
The resulting data are post-processed with v.lidar.correction. Finally, the DTM and DSM are generated with v.surf.bspline (DTM: uses the 'v.lidar.correction' output; DSM: uses last ping output from outlier detection).
See also ...
2. Spot elevations read throughout the file to provide an independent check of the DTM and / or generated contours. [NB DTM Users Guide]
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An integrated circuit device including its encapsulating package and circuit terminations.
Order any Very High Precison DSM/DTM before December 15, 2011 ad receive a complimentary Advanced Ortho Image.
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Support ...
Dual Transfer Mode (DTM) support for simultaneous voice and packet data connection in GSM/EDGE networks. Simple class A, multi slot class 11, max speed DL/UL: 177.6/118.4 kbits/s
EGPRS class B, multi slot class 32, max speed DL/UL= 296 / 177.
These include ArcInfo coverages; shapefiles; CAD, VPF, TIFF, JPEG, BMP, SunRaster, USGS DEM, DTM, Department of Defense DTED, generic ASCII, and MrSID files; and ArcGIS themes created from tabular data.
The result is that existing elevation data, such as the USGS Digital Terrain Models (DTM), are used in most cases. Since the GIS procedures are independent of the gridding resolution, inappropriate maps can be generated and used in decision-making.
The best place to start usually is with a focused web search, because that provides a good chance of uncovering recent additions to data sets. Use several key words, like "USGS", "DEM", 'DTED", "DTM", "7.
For example, a series of x, y and z points that have a virtual layer draped over their surface can form a 3 Dimensional Image. Digital elevation models are typically used to represent terrain relief. Also referred to as 'digital terrain model' (DTM).
 See also: Model, Digital, Feature, Information, GIS
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