  The problem of mathematical modeling in geography is one of the most
important strategies in order to establish the evolution and the prevision of
geographical phenomena. Models must have a simplified structure, to reflect
essential components and must be selective, structured, and suggestive and
approximate the reality. Models could be static or dynamic, developed in a
theoretical, symbolic, conceptual or mental way, mathematically modeled. The
present paper is focused on the virtual model which uses GeoGebra software,
free and available at www.geogebra.org, in order to establish new methods of
geographical analysis in a dynamic, didactic way.
