Automatic extraction and mapping of land-use information based on remote sensing

Abstract：It is an important method of the land use change dynamic monitoring to withdraws the land utilization information using remote sening image accurately and quickly.Also it gives an important basis for governments to promptly investigate the land utilization illegally and carries on prompt regulation to the land utilization.The TM satellite datum in upstream region of Danjiangkou reservoir are taken as an example, firstly, the datum are classified in supervised classification method by using remote sensing images software (ERDAS IMAGINE) .Secondly, the land-use information is extracted fastly by the auxiliary means of spatial-analysis with DEM, slope image and NDVI in the region.The method improved accuracy and speed of information extracting.Finally, the land-use information is output by the form of thematic map in MAPGIS software.

Keyword：land use;TM image;slope;DEM;NDVI;thematic map;