关于我国似大地水准面的精化及有关问题

基金项目: 国家自然科学基金资助项目(40174004)

详细信息

Refinement of Quasi-geoid in China and Relevant Problems

School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, China, 430079

摘要: 着重分析了我国新一代似大地水准面模型CQG2000的实际分辨率,给出了该模型的精度估计,得出总体分辨率为20km,精度为±0.4m;60%地区分辨率达到或优于10km,精度为±0.3m。介绍了目前精化大地水准面的国际先进水平,指出了进一步精化我国大地水准面的必要性和途径及有关问题。
- 大地水准面数值模型 /
- 分辨率 /
- 精度
Abstract: This paper discusses the role of refining geoid in the development of contemporary surveying and mapping,and considers that a gridded digital geoid model is really a reference frame in datum sense for orthometric or normal height measurement.The real resolution of the new generation quasi-geoid model CQG2000 in China is analysed in detail,and the accuracy estimates of the model is also described.In addition,the advanced level in geoid refinement abroad is briefly introduced,and the necessity,requirement and possible approach for further refining the quasi-geoid model in China are pointed out.
- geoid digital model /
- resolution /
- accuracy