Digital elevation model

Aim of the method/technique	Digital Elevation Model is used for the description of the altitude, aspect and slope.
Scale – spatial and temporal	Topographic information is obtained from a Digital Elevation Model (DEM) with 20-m resolution for the study area.
Brief description	Derived variables obtained from the DEM are: altitude, aspect and slope. The 3 maps are reclassified into discrete classes. Geomorphology is described distinguishing different landforms in each study area according to the regional slope, altitude criteria (Engelen and Wen, 1995).
Data requirements	Digital Elevation Model (DEM) with 20-m resolution.
Main applications in grazing land regions	Describe the geomorphological characteristics of a SES. To be used as explanatory variable to assess the relationship between SES components .
Strengths and weaknesses	---