CGCS2000与WGS84坐标系的应用差异分析——以南京市原国土系统坐标系为例  

Applied Difference Analysis Between CGCS2000 and WGS84 Coordinates——Taking the Original Land System Coordinate System of Nanjing as an Example

作　　者：叶君 侍荣 YE Jun;SHI Rong(Nanjing Real Estate Registration Center,Nanjing Jiangsu 210005,China)

机构地区：[1]南京市不动产登记中心,江苏南京210005

出　　处：《现代测绘》2021年第6期18-20,共3页Modern Surveying and Mapping

摘　　要：从坐标系的定义和实际应用两个方面阐述了国家2000大地坐标系与WGS84坐标系的差异,介绍了南京市原国土系统坐标系的建立过程,并以南京市原国土坐标系为例,比较了国家2000大地坐标系与WGS84坐标系在南京区域应用时,其坐标值存在的差异,得出可根据精度要求选择两种坐标值是否可相互替代的结论。同时,对于CGCS2000坐标系是否可直接与基于WGS84的似大地水准面精化成果结合使用进行了数据测算,分析了WGS84与CGCS2000坐标系下的似大地水准面应用差异,得出启用国家2000大地坐标系后,需要重新基于新坐标系精化似大地水准面的结论。最后,对启用国家2000大地坐标系对原有测绘成果产生的影响提出应对建议。Expound the difference between CGCS2000 and WGS84 from two aspects of definition and application. introduce the establishment process of the original land system coordinate system in Nanjing, takes the original land coordinate system in Nanjing as an example, compares the differences of coordinate values between CGCS2000 and WGS84 in Nanjing, and come to the conclusion that whether the two coordinate values can be replaced each other can be selected according to the accuracy requirements. At the same time, whether the CGCS2000 can be directly combined with the quasi geoid refinement results based on WGS84 is measured, the application differences of quasi geoid under WGS84 and CGCS2000 are analyzed, and it is concluded that after CGCS2000 is enabled, it is necessary to refine quasi geoid based on the new coordinate system. Finally, some suggestions are put forward to deal with the impact of using CGCS2000 on the original surveying and mapping results.

关 键 词：CGCS2000 WGS84 南京地籍坐标系 似大地水准面 

分 类 号：P226.3[天文地球—大地测量学与测量工程]