A target of this research cooperation is to develop methods to update the ATKIS DGM5 automatic. Further we try to adjust the terrain model with the landscape model (BasisDLM) and we are looking for a generalization method for the terrain model to make it usable together with landscape data for small scale maps. It is necessary to detect area that are out of date. In this areas we use special methods to update the terrain and landscape model. For this it is important to match the two-dimensional representation of the topography and the terrain model.