City Map Heidenheim
You will find different city maps of Heidenheim here.
The map data by OpenStreetMap is part of an international project aiming to create a free world atlas. You can import your data by a GPS device into the existing system. You can also download and print the city map as a PDF file. The GeoPortal of the County of Heidenheim shows interesting information, e. g. about biogas plants and windmill locations.