Creation of digital terrain models and GIS applications

Digital Terrain Models (DTM’s) are one of the fundamental tools in GIS analysis and image processing and are an important key to represent the Earth’s surface. The terrain is one example of a more general class of geographical phenomena in which the values are continuously variable in space. DTM has been used consistently in fields such as civil and water resources eng, virtual landscape, and military applications. This paper will discuss the definition of the term DTM, creation of the DTM in a selected sub-catchment of Hassaroste Mountainous, Roste Basin in Kurdistan region of Iraq with 44 km2 using topographic map with 1:100000 scale and a landsat 7 image with resolution 80 m, and the applications in various fields as ( slopes, area elevation curves, geology maps, etc..) using GIS techniques and the flexibility of TIN method in deal with rugged terrains.