Approximation of building boundaries

ABSTRACT: This paper proposes different methods for the approximation of building boundaries extracted from laser scanner data by means of an image reconstruction algorithm (Arefi & Hahn, 2005). A polygon is fitted to the boundary points to approximate and reduce the number of points. The approximation process is performed in both vector and raster space. Results show the characteristics, particularly the strengthes and shortcomings of the different means for approximation.