基于ADS40无控条件的海岛礁地形测量方法研究

针对远离大陆的海岛礁地形测绘与高程基准转换困难的问题,基于ADS40航摄系统获取远离大陆的海岛礁区域遥感影像,按照GPS差分无地面控制点的空中三角测量模式实现海岛礁的地理定位,选择高精度的卫星测高模型实现海岛礁区域的高程基准转换。在某海域进行了ADS40测量作业与高程基准转换试验,结果表明,无地面控制点空中三角测量的平面精度达到0.587m;基于卫星测高模型进行垂直基准转换的精度与同步验潮水位观测法得到的高程传递精度相当。

A Method for Topographic Survey in Areas of Island and Reef Based on ADS40 Uncontrolled Triangulation

To solve the problem of topographic survey in areas of Island and Reef,the remote sensing data in these areas can be captured by airborne digital sensor 40 （ADS40） and processed by uncontrolled aerial triangulation based on differential GPS.The high precise and resolution satellite altimetry model is chosen to transform the vertical datum.An experiment for topographic survey based on ASD40 and vertical datum transformation has been done in the south-sea area.The results show that the accuracy of horizontal control in uncontrolled aerial triangulation is 0.587 meter,and the accuracy of vertical datum transformation by satellite altimetry model is corresponding to the tide gauge method.