The program makes available information of the official topographical maps from the entire territory of the Federal Republic of Germany in various graphical windows and executes different coordinate transformations and map data calculations. Maps can be found by place names, community keys, coordinates, map names or map numbers. Or they can be selected from overview graphics. The program is prepared for the directly parameter input and for the input from files to calculate map and coordinate data.Control files can be pre configured in order to Federal Countries with the map numbers of the TK25, TK50, TK100 and TKUE200 maps. This makes possible to produce lists with parameters and corner coordinates. The program is network compatible. In the area of the planning and implementation of economic and scientific projects, topographical records frequently come to the application. The program TOPOWIN has been developed under participation of many regional surveying authorities into the investigation of topographical maps. The program participates an useful and versatile tool for engineer offices, planning offices and users of topographical maps. The topographical maps of different standards, required for a project, can be determined through the complaint of known parameters or through the direct selection from overview graphics and from sorted lists. By the investigation of topographical records on the basis of known places, a data base stands with approximately 62.000 places and residential places to the disposal.