Introduction The main purpose of terrain analysis is to describe the morphology of the land surface (for example, distribution of altitude, slope gradient, aspect, curvature, flow lines). It provides morphometric parameters that quantify geometrical properties of the land surface or identify specific land surface features (for example, peaks, landforms). Morphometric parameters and features may be grouped according to various criteria. For example, local parameters describe land surface properties at a given point and in its surrounding area. Basic local morphometric parameters are slope, aspect, profile and tangential curvatures. These local morphometric parameters are computed using the methods of differential geometry.