数字孪生基础数据高程基准统一技术研究  

Research on unified technology of elevation datum of digital twin basic data

作　　者：赵薛强[1] 凌峻 钱立兵 ZHAO Xueqiang;LING Jun;QIAN Libing(China Water Resources Pearl River Planning Surveying&Designing Co.,Ltd.,Guangzhou 510610,China;South China Sea Marine Survey and Technology Center,SOA.,Guangzhou 510300,China;Key Laboratory of Marine Environmental Survey Technology and Application,Ministry of Natural Resources,Guangzhou 510300,China)

机构地区：[1]中水珠江规划勘测设计有限公司,广东广州510610 [2]国家海洋局南海调查技术中心,广东广州510300 [3]自然资源部海洋环境探测技术与应用重点实验室,广东广州510300

出　　处：《人民长江》2023年第6期126-131,168,共7页Yangtze River

基　　金：国家重点研发计划项目“高度城镇化地区防洪排涝实时调度决策支持平台与示范应用”(2018YFC1508206);水利部粤港澳大湾区(河口区)水下地形测量项目(2019-388);水利部珠江河口四期水下地形测量项目(2017-394);广东省自然资源厅2021年省级促进经济高质量发展专项资金(GDNRC[2021]36);2021年流域重大关键技术研究项目(202109)。

摘　　要：为满足孪生流域等数字孪生建设对基础地理信息数据的强烈需求,确保工程建设高程基准的统一,基于GNSS观测技术和重力场模型,开展了数字孪生基础数据高程基准统一研究。构建了顾及地形特征的高精度区域似大地水准面模型,形成了数字孪生基础数据高程基准统一模型库,并利用模型精度和检测精度两种评价方法对高程模型和多场景采集的多源基础数据的高程改正成果开展精度评价。结果表明:①似大地水准面模型的内符合精度为±2.6 cm,外符合精度为±3.1 cm,优于EGM2008模型结合二次曲面拟合法等其他拟合算法,成果精度满足规范要求;②多源基础数据的高程改正成果中误差在±10 cm以内,满足数字孪生建设对基础数据的精度要求。该模型方法构建简单且精度高,具有广阔的应用前景,不仅可应用于数字孪生建设等领域,也可为大范围的工程测量、陆海高程基准统一等提供技术支撑。In order to meet the strong demand of digital twin construction for basic geographic information data,such as twin watershed,and to ensure the unification of the elevation datum of engineering construction,based on GNSS observation technology and gravity field model,we carried out this research.We constructed a high-precision regional quasi geoid model considering terrain features,thus forming a unified model library of digital twin basic data elevation datum.Through two evaluation methods of model accuracy and detection accuracy,the accuracy of elevation correction results of the elevation model and multi-source basic data surveyed in multi-scene was evaluated.The results showed:①The internal coincidence accuracy of the quasi geoid model was±2.6 cm and the external coincidence accuracy was±3.1 cm,which was better than the fitting algorithm of EGM 2008 model combined with quadric surface fitting,fulfilling the specification requirements;②The mean square error of elevation correction results of multi-source basic data was within±10 cm,meeting the accuracy requirements of digital twin construction for basic data.The method is simple,accurate and has a wide application prospect.It can not only be used in digital twin construction and other fields,but also provides technical support for large-scale regional engineering survey and land-sea elevation datum unification.

关 键 词：数字孪生 GNSS 似大地水准面模型 地形特征 高程基准 

分 类 号：P22[天文地球—大地测量学与测量工程]