The goal of the project is to build a module for GEOS program package which has been developed by ZEIA company. With this module it will be possible to realistically visualize 3D terrain according to input triangular mesh. Module will also have support for different lighting effects and colorisation for triangles, camera walk over terrain, rotatiton of 3D view, loading and mapping DOF (digital ortophoto aeroimages) in various file formats (TIFF, BMP, JPEG).