Knowledge based pipeline network peeling off recognition method of maps

Map recognition is an essential data input means of Geographic Information System (GIS). How to solve the problems in the procedure, such as the recognition of maps with crisscross pipeline networks, the classification of buildings and roads, and the processing of connected text, is a critical step for GIS keeping high-speed development. In this paper, a new recognition method of pipeline maps is presented, and some common patterns of pipeline connection and component labels are established. Through pattern matching, pipelines and component labels are recognized and peeled off from maps. After this approach, maps simply consist of buildings and roads, which are recognized and classified with fuzzy classification method in the next approach. In addition, the Double Sides Scan (DSS) technique is also described, through which the effect of connected text can be eliminated