Preparation of digital height model and landform unit map from topographic map (second part)

By using the geographic information system, it is possible to process and analyze different maps to achieve a specific goal. One of the most widely used data in geographic information system is digital elevation model (DEM). This data is used in the preparation of maps, such as the map of the slope, direction and elevation classes of the region, and most importantly, the map of the landform unit. One of the most important problems regarding this data is its permanent unavailability. Although many researchers and students have access to paper and digital topographic maps, geographic information system software does not have the ability to process and prepare maps such as slope and direction from simple topographic maps. In this training series, an attempt has been made to convert a topographic map, which is usually available to researchers and students or is easily prepared, into a model by using the facilities and functions provided by the Idrisi software. Digital height is described completely and in detail, and after that, widely used maps such as slope, direction and height are prepared from the obtained model.