Abstract: The precision requirement of landuse updating survey has been greatly enhanced,the scale of survey was also raised to 1:2000 now,it also reinforces the mechanism of checking and updating data,and the process has a specific stringent requirements.This paper studies the technology of spatial matching and discriminant analysis of complex elements in land renewal investigation,a multi-scale vector space data matching method based on buffer expansion is proposed.On the one hand,spatial features inherit the high precision of large-scale topographic cadastral data,the use of attribute feature integration multi-scale and the ownership of current information,to achieve effective integration between the same objects on the scale.On the other hand,comparison of computer differences between variable map spot issued by the state and current map spot in updated land use investigation,ensure that the update process is strict,standardized and highly automated.

Key words: land investigation, spatial matching, buffer expansion, difference discrimination