广东省近岸海域海面地形模型建立  

Establishment of sea surface topography model in the coastal waters of Guangdong province

作　　者：华水胜 杨广武 蔡怀玉 朱亚兵 HUA Shuisheng;YANG Guangwu;CAI Huaiyu;ZHU Yabing(Guangdong Land and Resources Surveying and Mapping Institute,Guangzhou 510500,China)

机构地区：[1]广东省国土资源测绘院,广东广州510500

出　　处：《海洋测绘》2024年第4期44-47,共4页Hydrographic Surveying and Charting

基　　金：广东省海洋经济发展专项(粤自然资合〔2022〕21号)。

摘　　要：广东省近岸海域缺少高精度海面地形模型,无法准确为广东省无缝垂直基准面提供可靠标定与统一转换。将长达19年水位数据的验潮站作为基准站,对其他长期、中期验潮站通过平均海面传递方法进行加密,并结合水准联测数据得到验潮站沿岸海面地形值,最终采用反距离加权法建立广东省近岸海域海面地形模型。评估结果表明该模型误差优于3.2 cm,明显高于有关参考文献给出的成果精度,对广东省陆海基准统一转换研究具有很高的参考和使用价值。The coastal waters of Guangdong province currently lack a high-precision sea surface topography model,which hinders the provision of accurate calibration and unified conversion for the seamless vertical datum in Guangdong province.This paper establishes a benchmark station using 19 years of water level data from a tide gauge station.Other long-term and medium-term tide gauge stations are densified through the method of average sea level transfer.This is combined with leveling survey data to determine the sea surface topography values at the tide gauge stations.Ultimately,an inverse distance weighting method is employed to develop a sea surface topography model in the coastal waters of Guangdong province.The assessment reveals that the error is better than 3.2 cm,significantly surpassing the precision levels reported in relevant literature.This model provides high reference and practical value for studies on the unification of land and sea benchmarks in Guangdong province.

关 键 词：海面地形 近岸海域 海面地形模型 基准验潮站 水准联测 趋势性分析 格网点内插 

分 类 号：P229.21[天文地球—大地测量学与测量工程]