区域土地资源遥感监测与时空演变分析

Monitoring of Regional Land Resources and Analysis of Spatio-temporal Evolution Based on Remote Sensing Technique

以西南地区宁南、会东、巧家3个县为例,基于遥感技术,利用高分辨率SPOT卫星影像,提取了研究区土地利用现状信息;在地理信息系统技术支持下,结合20世纪80年代末以来多期土地利用数据,统计了研究区土地利用结构变化情况,并对土地资源变化的驱动力进行了分析.在此基础上,根据国家退耕还林、还草的有关政策,结合区域高程、坡度数据,对当地未来耕地资源状况进行了预测.

Taking three counties-Ningnan, Huidong and Qiaojia,as an example,we extracted the present land use information in the studied area from high-resolution images of the SPOT satellite, based on re- mote sensing techniques. With the land use data since the end of eighties of the last century in the same ar- ea, supported by GIS, we counted the change of land use structures and analyzed the causes of land re- sources variation. On that basis,according to the nation＇s policies related to returning farmland to forests or grasslands, we predicted the situation of cultivated land resources in the future by combining it with eleva- tion and slope data in that area.