It has been suggested that Digital elevation model be merged into this article or section. (Discuss)

A digital terrain model (abbrev. DTM) is a topographic model of the bare earth that can be manipulated by computer programs. Image File history File links Please see the file description page for further information. ... A digital elevation model (DEM) is a representation of the topography of the Earth in digital format, that is, by coordinates and numerical descriptions of altitude. ... DTM is an abbreviaton of: Dynamic synchronous Transfer Mode DTM (nightclub), a nightclub in Helsinki, Finland Demographic transition model Deterministic Turing machine Deutsche Tourenwagen Masters German Touring Car Championship, formerly Deutsche Tourenwagen Meisterschaft Digital terrain model Dortmund Airport (IATA code) Degtyarev DTM Soviet machine gun, a version of the DP... A physical model is used in various contexts to mean a physical representation of some thing. ... A computer program or software program (usually abbreviated to a program) is a step-by-step list of instructions written for a particular computer architecture in a particular computer programming language. ...

The data files contain the elevation data of the terrain in a digital format which relates to a rectangular grid. Vegetation, buildings and other cultural features are removed digitally - leaving just the underlying terrain. A computer file is a collection of information that is stored in a computer system and can be identified and referenced in its entirety by a unique name. ... Basic Definition In geography, the elevation of a geographic location is its height above mean sea level (or some other fixed point). ... GRID can refer to : GRID computing short for gay-related immune deficiency, a former name for AIDS. See also homosexuality and medical science General Repository for Interaction Datasets, a database of biological interactions hosted at Mount Sinai Hospital in Toronto, Canada This is a disambiguation page — a navigational aid which... Building is either the act of creating an object assembled from more than one element, or the object itself; see also construction. ...

DTMs are used especially in civil engineering, geodesy & surveying, geophysics, geography and remote sensing. The main applications are: The Falkirk Wheel in Scotland. ... It has been suggested that geodetic system be merged into this article or section. ... Surveyor at work with a leveling instrument. ... Geophysics, the study of the earth by quantitative physical methods, especially by seismic reflection and refraction, geodesy, gravity, magnetic, electrical, electromagnetic, and radioactivity methods. ... SAR image of Death Valley colored using polarimetry In the broadest sense, remote sensing is the measurement or acquisition of information of an object or phenomenon, by a recording device that is not in physical or intimate contact with the object. ...

1. visualization of the terrain (Block diagrams etc.)
2. Calculation of project data or rock masses in civil engineering
3. Reduction (terrain correction) of gravity measurements (gravimetry, physical geodesy)
4. Terrain analyses in Cartography and Morphology
5. Rectification of airborne or satellite photos.

The most usual grid (raster) is between 50 and 500 meters. For several applications [espec. in (1)-(3)] a full resolution is required only for the central areas of the project. Therefore the huge data amount is reduced by a mix of two or three raster spacings. Visualization can refer to: Graphic Visualization as in any technique for creating images, diagrams, or animations to communicate any message. ... A block diagram is a pictorial representation of some process or model of a complex system. ... A project is a temporary endeavor undertaken to create a unique product or service. ... Sedimentary, volcanic, plutonic, metamorphic rock types of North America. ... The Falkirk Wheel in Scotland. ... Reduction or reducing has several meanings: In mathematics, reduction is the process of manipulating a series of equations or matrices into a desired simpler format. ... Gravity is a force of attraction that acts between bodies that have mass. ... Gravimetry is the measurement of a gravitational field. ... Definition Physical geodesy is the study of the physical properties of the gravity field of the Earth, the geopotential, with a view to their application in geodesy. ... Cartography or mapmaking (in Greek chartis = map and graphein = write) is the study and practice of making maps or globes. ... Morphology is the following: In linguistics, morphology is the study of the structure of word forms. ... A satellite is any object that orbits another object (which is known as its primary). ... Suppose the smiley face in the top left corner is an RGB bitmap image. ...

In gravimetry e.g., the primary grid may be 50 m, but is switched to 100 or 500 meters in distances of about 5 or 10 kilometers.

A digital terrain model may be used to guide automatic machinery in the construction of a physical model, the relief map. A relief map is a three dimensional representation, usually of terrain. ...