Jochen Rethmann, Hochschule Niederrhein, FB Elektrotechnik und Informatik, Reinarzstraße 49, 47805 Krefeld
Planarization of CityGML models using a linear program
OR 2016 (Springer Verlag, pp. 591-597)
Abstract
| CityGML is an XML based description standard for 3D city models that requires model buildings to have planar roof facets. Unfortunately, current tools that generate building models from airborne laser scanning point clouds violate this requirement to some extent. We propose a definition of approximate planarity and present a post-processing tool that establishes approximate planarity using linear optimization. It preserves the characteristic shape of roofs. In most cases, triangulation of non-planar facets is no longer needed. This not only reduces the number of facets and increases performance of applications that process city models, but also avoids disturbing lighting artifacts. |