基于TM影像的土地利用信息的自动提取与制图

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

以丹江口水库上游库区的TM卫星数据为例,首先利用遥感图像处理软件(ERDAS IMAGINE)中监督分类的方法对该区遥感数据进行分类,然后利用该区域的DEM、坡度图、归一化植被指数作为辅助手段进行空间分析,快速提取该区域的土地利用信息,提高了信息提取的速度及精度,最后利用MAPGIS软件对提取的土地信息以土地利用专题图的形式输出。

Land-use information is fast, accurately extracted, which has the vital significance for the government decision-making body as well as the land users. The traditional land information acquisition methods can not meet the current social needs in the precision and the speed. The paper take TM satellite datum in upstream region of Danjiangkou reservoir as an example, firstly, classified in supervised classification method by using remote sensing images software （ERDAS IMAGINE）. Secondly, extracted the land-use information fast by the auxiliary means of spatial-analysis with DEM,slope image,NDVI in the region. It improved accuracy and Speed in this methods. Finally, the land-use information is output by the form of thematic map in MAPGIS software.