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为推动雷达数据在高原山区的应用,以贵州省安顺市为例,利用SAR数据并辅助TM影像、DEM等数据,以灰度图像差值法、混淆矩阵法等为基础,对星载Sentinel-1A雷达数据进行短期土地利用监测的可行性做初步探究.结果表明:(1)差值获取的土地利用变化信息简单直观,有部分伪变化;(2)土地利用变化阈值范围是-0.4~3.6.城市建设用地及植被变化差异有统计学意义,水体变化差异无统计学意义;(3)变化信息监测总准确率均达到80%,Kappa系数均在0.7以上,基本达到数据统计分析的一般准确率要求.因此,Sentinel-1A数据监测高原山区土地利用变化可达到实际应用标准,并结合DEM可有效降低高原山区气候和地形等因素的影响.
In order to promote the application of radar data in mountainous areas of the plateau, taking SAR data of Anshun City, Guizhou Province as an example, based on the SAR data and the assistance of TM images and DEM data, based on the gray image difference method and the confusion matrix method, (1) The difference of land use change information obtained by the difference is simple and intuitive, with some pseudo-changes; (2) The threshold range of land use change is -0.4 ~ 3.6 .The difference of urban construction land use and vegetation change was statistically significant, and there was no significant difference between the water body changes; (3) The overall accuracy of change information monitoring reached 80%, Kappa coefficient above 0.7, basically reached the general accuracy of data statistical analysis Therefore, the Sentinel-1A data can be used to monitor the changes of land use in plateau mountainous areas, and the combination of DEM can effectively reduce the influence of climatic and topographical factors in plateau mountainous areas.