Research on technology for land use map renewal and database construction

National land use database construction projects in county(or city)level was started in 1999.As an important part of "Digital Land Project", Government in various level paid much attention to database construction, preliminary achievement has been made, but difference between area with various social and economic condition is objective and obvious. These areas with comprehensive basic material have already finished building land use database, which has been applied in land management, on the contrary, those region with incomplete basic data encountered enormous difficult, owing to historical reasons, present situation of data can not meet the request of establishing database ,so the work is still walk back and forth. these original data must perform part or overall updating investigation in order to meet the need for database construction. In this paper, we discuss a series of new technology(or methods) adopted in the course of land use current situation updating partially (or overall renewing)and database construction, at the same time, bring up the choice method of the technological route under various basic materials situations, finally, suggestion solution is made out in the light of common problem.