The present maps are often available only in an analogue form and they are usually not actual enough. GIS experts need basic topographic data layers as precise and actual as possible, with high information density, to support and update the thematic databases. These requirements can be saturated by aerial photographs that provide much more information than any topographic map at higher accuracy. The photogrammetric processing of aerial photographs produces two types of data -3D vector data (topography and hypsography) and raster data in the form of ortophotomaps. These products can used can be used within the GIS as a multifunctional and highly actual map base.