粤港澳大湾区大地基准和高程基准的统一  

Unification of Geodetic Datum and Height Datum of the Guangdong-Hong Kong-Macao Greater Bay Area

作　　者：邓思胜 宋传峰 陈敬[1] 侯雪[1] DENG Sisheng;SONG Chuanfeng;CHEN Jing;HOU Xue(Surveying and Mapping Institute,Lands and Resource Department of Guangdong Province,Guangzhou 510500,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]广东省国土资源测绘院,广东广州510500 [2]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《地理空间信息》2022年第5期169-172,共4页Geospatial Information

基　　金：广东省“十三五”基础测绘资助项目(粤自然资测绘函[2019]1180号);广东省自然资源厅科技资助项目(GDZRZYKJ2020006)。

摘　　要：现代测绘基准包括大地坐标基准和高程基准,是一个国家或地区经济建设和社会发展的基本设施。粤港澳大湾区测绘基准建设项目充分利用新联测的大地控制网和已有的市级高程异常控制点等成果,通过对全域的GNSS联测以及在肇庆地区的水准测量,建立了大湾区统一的现代大地控制网和陆海统一的高精度似大地水准面模型。经检验,该模型的内、外符合精度分别为1.0 cm和1.7 cm。该项目的实施实现了粤港澳大湾区大地基准和高程基准的统一,并与已有广东CORS服务系统共同构建了三维实时动态的高精度基准服务,有助于粤港澳大湾区国家发展战略的实施。Modern surveying and mapping datum, including geodetic datum and height datum, is a basic infrastructure for economic construction and social development of a country or region. In the Surveying and Mapping Datum Construction project for the Guangdong-Hong Kong-Macao Greater Bay Area(GBA), a unified modern geodetic network was firstly constructed through global navigation satellite system(GNSS) measurement, and second order leveling of Zhaoqing region. Secondly, a high-precision quasi-geoid model, which covers the related GBA lands and sea areas, was determined by fully utilizing this network and the existing height anomaly control points of each city in the GBA. The check results show that the model inner precision is approximately 1.0 cm while the outer precision is approximately 1.7 cm. Through the project implementation, the GBA geodetic datum and height datum were unified, and 3D real-time dynamic high-precision datum service was established on the basis of the existing Guangdong CORS service system, which helps the GBA national development strategy implementation.

关 键 词：粤港澳大湾区 大地基准 高程基准 似大地水准面 CORS GNSS CGCS2000 1985国家高程基准 

分 类 号：P228[天文地球—大地测量学与测量工程]