摘要
数字高程模型是进行地学研究的重要基础数据,SRTM、DEM是公众可以免费获取的精度达90m的DEM数据。以我国1∶5万DEM为参考数据,以巢湖流域为研究区,利用高程中误差模型和单位面积土地填挖方对SRTM、DEM进行高程精度研究,并分析了高程误差的空间分异规律。结果表明,SRTM、DEM的高程中误差和单位面积土地填挖方随着地貌类型的变化呈现明显的空间分异性,这主要由于SRTM像元精度不高所致。在研究区内的33块样区中,绝大部分都是在二级精度评价标准之内,可见SRTM、DEM整体精度较高。
Digital Elevation Model （DEM） was the essential data for research on terrain and SRTM data were the public free access dataset with 90m reolution. The thesis u＇eated the state 1：50000 DEM as reference contrastive data and the Chaohu basin as the research area. The SRTM, DEM＇s rlevation accuracy were researched in this paper, using elevation RMSE model and Cut/Fill per square meter. In addition, analyzed the spacial distritution of the elevation error. The results showed that the SRTM, DEM＇s mean square error of height and cut/fill per square meter present obvious spacial distribution along with geomorphic type changed. It was mainly caused that SRTM, DEM＇s pixel was low precision. Among the 33 sample area in the research area, most of the result was higher than level 2 accuracy evaluation standard. It was thus clear that the SRTM, DEM had high precision in general.
出处
《资源开发与市场》
CAS
CSSCI
2011年第12期1062-1064,F0002,共4页
Resource Development & Market
基金
安徽教育厅自然科学基金重点项目(编号:KJ2010A250)
安徽省高等学校省级优秀青年人才基金项目(编号:2011SQRL124)
