摘要
GPS点校正是RTK测量工作的基础,通过不同的坐标转换模型,将WGS-84坐标转换至国家/地方坐标。如何优选适宜的校正模型从而取得较好的校正效果呢?文章以纳米比亚某地区GPS点校正实例计算,充分利用GPS后处理软件(TGO1.63)的GPS点校正功能,进行精度对比分析,得出结论:对于大范围的工程测量,可以通过对其校正模型组合来提高校正精度,并且二维七参数转换法可以得到高精度的平面转换坐标,采用两步法可以得到高精度的三维转换坐标。
The GPS points calibration is the foundation of GPS RTK surveying, through different coordinates transformation model, the coordinates from WGS - 84 to national/local coordinate system are converted. How to optimize calibration model to obtain better correction effect.9 As GPS points correction calculation for cases in Namibia, using the GPS points correction function of GPS post-processing software （TGO1.63）, the precision is compared and analyzed, so the conclusions are obtained that for large range of engineering surveying, we may improve correction precision with combination correction model function, obtain plane converted coordinates with high precision using 2D seven-parameter conversion method, and also obtain 3D conversation coordinates with high precision using two-step method.
出处
《勘察科学技术》
2012年第6期46-50,共5页
Site Investigation Science and Technology
关键词
WGS-84坐标
国家
地方坐标
GPS点校正
七参数转换
两步法转换
水平平差
垂直平差
WGS - 84 coordinate
national/local coordinate
GPS points calibration
seven-parameter transfor- mation
two-step conversion
horizontal adjustment
vertical adjustment
