Research On The Technology Of Land Use Database Updating

In recent years,domestic and foreign experts in the updating of land use database conducted in-depth research and practice.However,due to the limitations of the technology,there are still the questions as follows:(1)The method of incremental information extraction ofDLTB?LBXDW?XZDW used single layer extraction method of the land use data,and the incremental information extraction of LXDW and XZDW depended on the DLTB;(2)Because the area unit of the summary table and the database was different,so produced the rounding error when converting the unit and leaded to the elements of all kinds of summary tables was not consistency.Aimed at those two problems,the paper proposed the linkage method of incremental information extraction based on topology and attribute logic,and the consistency control method of summary table based on the basic table.And in Microsoft Visual C++ development environment,designed and implemented the tools of incremental information extraction and summary table generation based on the FeatureStation of CASM.And proved the rationality and availability by verified of actual production data,in order to provide effective technical reference for the relevant work of the land use database in China.