摘要
讨论七参数转换方法应用需要满足的条件,分析大地高误差对转换精度的影响,指出若要其影响忽略不计,大地高精度需要达到厘米级;在转换参数未知的条件下,对在相对地球表面很小的区域,采用公共点计算七种参数方法的可行性提出了质疑。
In this paper, the conditions for the application of the seven-parameter conversion method are discussed, and the influence of geodetic height error on the conversion accuracy is analyzed. It is pointed out that if the effect is ignored, the precision of the earth needs to reach centimeter level. Under the condition that the conversion parameters are unknown, the feasibility of using the common point to calculate the seven parameter methods in the region with very small relative surface of the earth is questioned.
引文
[1]李明峰,刘支亮,王永明.大旋转角空间直角坐标转换改进模型研究[J].大地测量与地球动力学,2017,37(5):441-445.
[2]张全德,郭春喜,王斌.华北地区似大地水准面精化[J].测绘通报,2007(7):16-18.