In architecture and engineering, there is a substantial need for
semantically rich 3D models of buildings. As 3D designs are most
often not available, or significantly different from the “as-is”
condition of a given building, technology for creating models from
observations is of primary importance. 3D acquisition devices such
as laser scanners are now available for fast, accurate and costeffective acquisition of 3D data. However, efficient methods must
be devised to extract higher-level models from the acquired raw
point-cloud data.