基于SVM的曲靖市麒麟区土地利用演变时空分析

Spatial and Temporal Analysis of Land Use Evolution in Qilin District of Qujing City Based on SVM

基于2009和2015两个时相的TM/ETM+遥感影像数据,利用支持向量机分类SVM技术分析了2009-2015年曲靖市麒麟区土地利用/覆被变化情况,从土地利用类型变化率指数、综合土地利用动态度和土地利用转移方向与特征等方面对土地利用变化时空规律进行了分析.结果表明,麒麟区在近6a里森林覆盖率保持较好,耕地面积略有减少,但草地和水域面积减少幅度较大,建设用地和未利用地有明显增幅.

TM/ETM＋ remote sensing data of 2009 and 2015 in two phases were used to analyze land use/cover change in Qilin district of Qujing City by support vector machine classification of SVM technology. Spatial and temporal analysis of land use evolution was done from the changing rate index, comprehensive dynamic degree,and transferring direction and characteristics of the land use. The results showed that Qilin forest coverage rate during nearly six years was kept well and cultivated land area decreased slightly, but the grassland and water area decreased greatly and both unused and constructive land increased obviously. The results can provide scientific reference for land change monitoring and agricultural sustainable development in this area.