摘要
对AW3D30的绝对高程精度,特别是在我国典型区域的绝对高程进行验证分析,对于后续该数据集的应用具有参考价值,对于我国自主的全球高精度DSM数据生产也有一定的借鉴意义。本文选取了我国4种典型区域,以SRTM、部分高精度野外控制点以及ICESat/GLAS为辅助参考数据,对AW3D30进行了精度验证。采用地理信息系统(GIS)空间统计分析方法选取平均误差、标准差、中误差等参数指标进行精度验证,同时,分析了坡度、地表覆盖等因素对精度的影响。结果表明:AW3D30的高程精度与坡度有很明显的相关性,坡度较大地区高程精度较差,但在坡度小于5°时其高程精度可达5.0 m,在坡度小于1°时高程精度可达到3.0 m。地表覆盖类型也会对精度造成一定的影响,其中,林地影响对精度的影响最明显,而人造地表的影响最小。
In order to reveal the precision of AW3 D30 elevation data products in China,we combined the existing data products with four typical areas in China,mainly using SRTM as the reference,auxiliary reference data is the part of elevation control points and GLAS for the AW3 D30 accuracy verification. Using the geographic information system（ GIS） spatial statistical analysis method to select parameters which contain the mean error,standard error,mean square error to verify the accuracy,at the same time,analyzes the influence of factors such as slope and the landcover on precision. Results show that the slope has obvious correlation with the precision,elevation accuracy in larger slope area is more poor. But the slope is less than 5. When the elevation accuracy of up to 5.0 m,the slope of less than 1 degree elevation accuracy up to 3. 0 m. Landcover types will also be a certain effects on the precision,with AW3 D30 woodlands affect the most obvious and artificial surface effect is minimal.
作者
袁小棋
李国元
高小明
张文君
禄兢
YUAN Xiaoqi;LI Guoyuan;GAO Xiaoming;ZHANG Wenjun;LU Jing(Changchun University of Science and Technology, Changchan 130022, China;Satellite Surveying anti Mapping Application Center, NASMG, Beijing 100048, China)
出处
《测绘与空间地理信息》
2018年第4期98-101,105,共5页
Geomatics & Spatial Information Technology
基金
重点研发计划:多星多源多分辨率分布式遥感信息处理(2016YFB0501005)资助
