Digital photogrammetry,satellite images,as well as nautical maps were used to monitor the shoreline changes of the northern Jiangsu Province,the Huanghe River Delta and beaches in the eastern part of Shandong Province...Digital photogrammetry,satellite images,as well as nautical maps were used to monitor the shoreline changes of the northern Jiangsu Province,the Huanghe River Delta and beaches in the eastern part of Shandong Province and Australia. Practical methods are proposed to obtain shoreline position from aerial photographs for sand beach with small velocity of change and from satellite images for mud flat with large velocity of change but very small beach slope. Analysis of errors for each method showed that the precision(relative errors)was 0.16 m in vertical direction and 0.75 m in horizontal direction (digital photogrammetry) and about 40～50 m (landsat images).展开更多
文摘Digital photogrammetry,satellite images,as well as nautical maps were used to monitor the shoreline changes of the northern Jiangsu Province,the Huanghe River Delta and beaches in the eastern part of Shandong Province and Australia. Practical methods are proposed to obtain shoreline position from aerial photographs for sand beach with small velocity of change and from satellite images for mud flat with large velocity of change but very small beach slope. Analysis of errors for each method showed that the precision(relative errors)was 0.16 m in vertical direction and 0.75 m in horizontal direction (digital photogrammetry) and about 40～50 m (landsat images).
