| InSAR DEM精度与地形特征的关系分析 |
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| 引用本文： | 丁琼,刘国祥,蔡国林,马德英.InSAR DEM精度与地形特征的关系分析[J].测绘科学,2009,34(1). |
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| 作者姓名： | 丁琼 刘国祥 蔡国林 马德英 |
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| 作者单位： | 西南交通大学士木工程学院测量工程系,成都,610031 |
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| 摘 要： | 为研究InSARDEM与地形特征的关系,本文以从不同空间位置获取的两幅SAR影像作为实验数据,将InSARDEM与USGSDEM进行比较,分析了InSARDEM的精度,并研究其与坡度、坡向之间的关系。结果表明,本次实验InSARDEM与USGSDEM高程差异中误差为+19.11m,其精度与地形特征强烈相关,随着坡度的增加,InSARDEM精度降低,且前坡处高程精度高于后坡。
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| 关 键 词： | 合成孔径雷达干涉测量 数字高程模型 坡度 坡向 |
Analysis of the correlation between the InSAR DEM accuracy and topographic features |
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| DING Qiong,LIU Guo-xiang,CAI Guo-lin,MA De-ying.Analysis of the correlation between the InSAR DEM accuracy and topographic features[J].Science of Surveying and Mapping,2009,34(1). |
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| Authors: | DING Qiong LIU Guo-xiang CAI Guo-lin MA De-ying |
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| Abstract: | In order to analyze the correlation between the topographic feature and the extracted DEM by InSAR technology,experiments were carried out by using two SAR images attached in the ERDAS IMADINE software.Firstly,the derived DEM was compared with the USGS DEM which was considered as reference.Then,reference topographic DEM was used to compute terrain slope and aspect to evaluate the accuracy of the derived DEM as a function of the slopes and aspects.The results showed that InSAR DEM accuracy of this experiment is +19.11m.The DEM was closely correlated with the terrain slope,and better results generally occurred in the foreslopes than in the backslopes. |
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| Keywords: | InSAR digital elevation model slope aspect |
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