毛乌素沙漠土地利用类型解译标志的建立——以榆阳区为例

Establishment of Interpreting Key on Land Use Types in Mu Us Desert——A Case Study of Yuyang District

为了准确地了解毛乌素沙漠的土地利用类型,掌握沙化土地的发展动态,以榆林市榆阳区为例,在ERDASIMAGINE软件支持下对TM影像进行处理,建立榆阳区土地利用分类系统,依据此系统对处理后的图像建立解译标志,并应用人机目视解译的方法进行区划,经现地验证,其结果判正率大于95%,可以满足解译精度的要求,说明此方法建立的解译标志是可行的,可对毛乌素沙漠土地利用类型作准确的解译,并为在微机平台上全数字化解译整个沙漠土地利用类型提供了基础。

In order to understand accurately the land use type of the Mu Us sandy land, controlling the expand trend of sand land, Yuyang district was token as an example to set up the interpreting key of the Mu Us sandy land. TM image was processed by the ERDAS IMAGING software and a land use system was founded. The interpeting key was established through this system. Applying the ArcGIS software, the plot of YuYang district was made by Man-machine interactive visual interpretation. Through field survey,the result of correct rate was above 95% and it could meet the need of interpreting accuacy. A conclude could be draw that the interpreting key was feasible for accurately interpreting the land use type of the Mu Us sandy land,and it also provided a groundwork for digital processing to interpret remote sensing images of the land use type of Mu Us sandy land.