Computer-aided cartographical system for map digitizing

摘要

The authors present a PC-based cartographical system to digitize maps. A memory restriction made us develop special technologies and techniques to digitize large-sized map-drawings. The combination of manual digitizing and labeling with automatic vectorization and recognition, and interactive editing allowed us to get satisfactory time characteristics for digitizing complex maps. To process automatically scanned maps in a restrictive computer memory, an effective pipeline oriented scheme and new techniques have been developed. A new process called object labeling has been introduced to speed up the interpretation process. An output database structure has been suggested to store all needed information about the map.