Research on the system of matching and rectifying vector electronic map

when facing one vector electronic map with correct spatial location information and the other one with correct physics attributes, it is a significant research work to rectify the latter one according to the prior one's correct spatial location information. The map-rectification which can rectify them to similar spatial location information is a method to save time and reduce the financial venture. But the exited software can't solve the problem completely. The block rectification precision, the rectifying time and other problems obstruct the applications of the rectifying software. The research of this dissertation focuses on the methods of map rectification, the flow-chart of map rectification and relative arithmetic. The main research works are as follows: (1) By reviewing the current research situation of map rectification, the characteristics of all kinds of methods are summed up. Comparing the exited methods, some principles which must be considered in developing software are also put forward. (2) Research on the principles and methods of map rectification based on Delaunay triangle helps to develop some relative arithmetic. (3) A new method of map rectification is explained in detail. A software system of vector map rectification based on VC is presented, and some experimentation results are shown.