#What is a digital terrain model series#

DEM is that the number of regional terrain, elevation Z coordinates on the plane X, Y, the two variables of continuous function of a limited discrete said, a series of ground from the X, Y location and elevation linked by some Organization structure with the actual terrain features that the spatial distribution model, it is a spatial information system an important component part. Digital elevation model (DEM) is known to be one of the most important national fundamental geographic information data. Terrain Elevation attribute is the basis of the model attributes, other elements of the terrain elevation attributes can be directly or indirectly receive, digital elevation model (Digital Elevation Model, acronym DEM) acts as a digital terrain on the main study. A DEM is a digital representation of the land surface elevation with respect to any reference datum (Balasubramanian, 2017). As soon as any data is loaded into LSS it is modelled. This triangular mesh is at the heart of everything we do in LSS and isnt even a separate command. Digital Terrain Elevation Model mainly contains the attributes of surface morphology, as well as other attributes, such as slope, aspect and so on. Digital Terrain Models (DTM) sometimes called Digital Elevation Models (DEM) is a topographic model of the bare Earth that can be manipulated by computer programs.The data files contain the elevation data of the terrain in a digital format which relates to a rectangular grid. All LSS products will produce a triangulated digital terrain model (DTM). Therefore, the DTM in land use analysis, and rational planning, forecasting flood danger, as well as military navigation and missile guidance systems, and combat electronic sand table, and other fields are widely used.

DTM is the basis of geographic information system data, mainly used to describe the ground state of ups and downs, the terrain can be used to extract various parameters such as slope, aspect, roughness, and Visibility analysis, watershed generation applications such as structural analysis. With the world of computer technology and the rapid development of 3-D visualization technology into the traditional static two-dimensional map of the three-dimensional terrain modeling makes a Geographic Information System (GIS) and digital mapping, a new field of study. Digital Terrain Model (Digital Terrain Model acronym DTM) is arbitrary use of a large number of coordinates in three-dimensional x, y, z coordinates of the point on the ground for a form of Statistics said that the terrain surface morphology is the number of attribute information is a space location characteristics and attributes of the terrain described the figures, initially for the automatic design of highway proposed. (3) Display of the results of the analysis on the digital terrain model or contour map so the transportation planner can review and verify the results in the.

What is a digital terrain model