EXTRACTING AND RECTIFYING BUILDINGS UTILIZING FEATURES OF A SCANNED TOPOGRAPHIC MAP

Abstract

The purpose of this paper is to extract the buildings distributed in the broad area when an existing raster map is converted into a digital map, and to rectify their vector chains, automatically. The problem is in the map that natural objects, artificial objects, and signs with various geometries crowd and exist together, as a result they comes in contact and overlaps, and in some cases they are divided into some parts. We pay attention to the characteristics of a loop, straight lines, right-angled and size of a building, and the loops of buildings are detected in accordance with their peculiar geometrical feature and then they are rectified.