摘要
“数字清江”系统构建的基础是基于SPOT卫星数据处理所得到的三维地形平台。针对“数字清江”基础数据所用到的SPOT卫星遥感影像 ,简要介绍了SPOT卫星影像的有关知识 ,并根据“数字清江”系统中DEM(数字高程模型 )具体生成过程及其实际应用 ,比较以前直接应用原始影像及原始参数模型生成DEM的传统做法 ,提出利用几何校正后的卫星模型参数生成DEM方法 ,实际应用证明 ,这种方法对于提高清江流域DEM的精度有作用 ,并能够提高整个三维平台的精度 ,从而提高了整个“数字清江”系统的精度。
The establishment of “Digital Qingjiang River' system is based on 3 D topographic platform formed by processed SPOT satellite data. In the light of SPOT satellite remote sensing data used as fundamental data of “Digital Qingjiang River', the correlative knowledge about satellite image is briefly introduced and according to concrete generating procedure of DEM (Digital Elevation Model) in “Digital Qingjiang River' and practical application, the comparison with traditional DEM establishment method by directly using original image and parameter was carried out, the DEM establishment method by geometric-corrected satellite model parameter is suggested. The practical application demonstrates that this method is useful to improving the DEM accuracy of Qingjiang river valley as well as the integral accuracy of the 3D platform and thereby to improving the accuracy of “Digital Qingjiang River' system.
出处
《人民长江》
北大核心
2003年第5期44-46,共3页
Yangtze River
