Creating Physical 3D Maps Using Rapid Prototyping Techniques

To build multicoloured physical models of three-dimensional cartographic objects computer-controlled devices can be used which were developed for the fast and inexpensive production of mechanical parts. Such objects can be a landscape with relief, a city model, or a continuous surface interpolated from statistical data. The main groups of rapid prototyping technology – aggregation, removal and, transformation – are presented, including the machinery to build physical models, and a new relative, laser subsurface engraving. Examples of surface models built by a 3D multicolour printer demonstrate the capabilities of the technology. A new WWWbased service is described which enables the production of 3D relief models covered by satellite imagery, topographic maps and user-supplied GPS tracks.