Digital 3D terrain model

Nowadays, 3D model today is the standard way for interpretation the terrain surfaces in a digital form. Terrain surface is present by a mathematical model, based on the use of proper height grid or the use of irregular triangles grid (TIN). These models are formed on the basis of known position and point height and characteristic lines (structural and break lines) of the terrain surface. In this sense, the optimum selection of a representative sample of data has a primary importance for quality formation of digital 3D terrain model, which will provide the quantity, distribution and quality modeling of the terrain surface in accordance with the required accuracy.