CAJ | 학술논문

ASTER DEM是利用高分辨率卫星成像设备ASTER获取的立体影像生成的DEM，其全球覆盖范围较广、数据获取快、质量稳定。但其数据精度和质量在我国区域内存在较多不确定性，本文选取具有高山峡谷等典型地貌特征的秦岭山区的ASTER DEM数据，以相应1∶50000地面高程库数据作参照，从总体统计、检查点法以及剖面法几个方面对其精度进行了实验与分析。结果表明，与地面1∶50000地面高程库相比，ASTER DEM误差值所对应的点数数据分布呈正态分布，RMSE为30．109358028165158 m；且其在山峰上的高程值会有所降低，在山谷中的高程值会有所增加。
ASTER DEM시이용고분변솔위성성상설비ASTER획취적입체영상생성적DEM，기전구복개범위교엄、수거획취쾌、질량은정。단기수거정도화질량재아국구역내존재교다불학정성，본문선취구유고산협곡등전형지모특정적진령산구적ASTER DEM수거，이상응1∶50000지면고정고수거작삼조，종총체통계、검사점법이급부면법궤개방면대기정도진행료실험여분석。결과표명，여지면1∶50000지면고정고상비，ASTER DEM오차치소대응적점수수거분포정정태분포，RMSE위30．109358028165158 m；차기재산봉상적고정치회유소강저，재산곡중적고정치회유소증가。
ASTER DEM is produced by a stereo image pairs take by ASTER -a high resolution satellite .They cover most of the glob-al, and can rapid acquire data, and the quality is stable.However, its data accuracy and quality have some indetermination in our country district.ASTER DEM of Typical physiognomy character in Qinling containing high mountain and valley is selected , comparing with 1∶50 000 national digital elevation data , during collectivity statistic , reference point method and section plane method , the preci-sion of ASTER DEM is experimented and analyzed .The result shows that comparing with 1∶50 000 national digital elevation data , the error corresponding numerical value data distributing present normal distribution , the RMSE is 30.109358028165158 meters;the ele-vation value of the peak is lower , and the elevation value of the valley is higher .