DTM represents the elevations of bare ground surface, location and shape of landscape obstacles without considering vegetation, buildings, and other man-maid objects. Digital terrain model based on processing and interpretation of remote (space) sensing materials. Used sources and their accuracy are defined depending on the project goal.
DTM can be represented as:
- a regular matrix of the earth's surface heights. Matrix representation is usually used in telecom projects and deliver in any RF-planning tool format: Planet, Atoll, ATDI etc.
- TIN-model (TIN − Triangulated Irregular Network) – vector representation usually used in GIS projects as OBJ, 3DS, VRML, DXF, Google Earth KMZ files
DTM is a one of important layer of RF-maps and also widely used for environmental management and architectural projects:
- Landscape and city planning
- Construction of highways and railways.
- Flood modeling
- Geological analysis etc.