A Method for the Automated Construction of 3D Models of Cities and Neighborhoods from Official Cadaster Data for Solar Analysis

3D city models are a useful tool to analyze the solar potential of neighborhoods and cities. These built from buildings footprints elevation measurements. Footprints widely available, but datasets remain expensive time-consuming acquire. Our hypothesis is that GIS cadastral data can be used build model automatically, so generating complete cities done in short time with already available data. We propose method for automatic construction 2D study their usefulness analysis by comparing results those hand-built model. The show accuracy evaluating access on pedestrian areas rooftops close slight differences 3.4% 2.2%, respectively. On other hand, saving significant. A neighborhood 400,000 m2 up 30 min, 50 times faster than an entire 967 km2 8.5 h.