基于格网的高程异常拟合模型在海洋测绘中的试验分析  

Experimental Analysis of Height Anomaly Fitting Model based on Grid in Ocean Surveying and Mapping

作　　者：曾宝庆 应超然 张炳蔚 杨翊霖 楼淑文 ZENG Baoqing;YING Chaoran;ZHANG Bingwei;YANG Yilin;LOU Shuwen(Zhejiang Institute of Hydraulics&Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310017,Zhejiang,China;Zhejiang Qiantang River Basin Management Center,Hangzhou 310016,Zhejiang,China;Suzhou Fenghua International School,Suzhou 215211,Jiangsu,China)

机构地区：[1]浙江省水利河口研究院(浙江省海洋规划设计研究院),浙江杭州310017 [2]浙江省钱塘江流域中心,浙江杭州310016 [3]苏州枫华国际学校,江苏苏州215211

出　　处：《浙江水利科技》2024年第5期62-66,共5页Zhejiang Hydrotechnics

基　　金：浙江省省属科研院所扶持项目(ZIHEYS23002)。

摘　　要：以浙江省舟山东海海域为试验区域,利用浙江省卫星导航定位基准服务平台生成的格网高程数据,结合二次曲面拟合模型,针对不同分区面积和不同控制点格网间距情况建立高程异常拟合模型,统计各拟合模型的精度特征指标。结果表明,随着分区面积逐渐增大,拟合精度逐渐降低。为此,应考虑到多分区,以提高拟合精度,同时也需注意到分区过多会增加工程计算量。在海洋测绘工作中应兼顾精度和经济效益,选择合适的分区面积。随着控制点格网间距逐渐减小,拟合精度逐渐提高,但提高幅度较小,说明在控制点分布均匀的情况下,控制点间距减小对提高模型拟合精度有利,但影响有限。Taking the East China Sea area in Zhoushan,Zhejiang Province as the experimental area,using the grid elevation data generated by the Zhejiang Provincial Satellite Navigation and Positioning Reference Service Platform,combining the quadratic surface fitting model,a height anomaly fitting model was established for different partition areas and grid spacing of different control points.Statistical analysis was conducted on the accuracy characteristic indicators of each fitting model.The results showed that as the partition area gradually increases,the fitting accuracy gradually decreases.Therefore,it should be considered that multiple partitions can improve fitting accuracy.At the same time,it should be noted that excessive partitioning can also increase the amount of engineering calculations.Therefore,in marine surveying and mapping work,both accuracy and economic benefits should be taken into account to select appropriate zoning areas.As the spacing between control point grids gradually decreases,the fitting accuracy gradually improves,but the improvement was relatively small.This indicates that in the case of uniform distribution of control points,reducing the spacing between control points was beneficial for improving the accuracy of model fitting,but the impact was limited.

关 键 词：格网 二次曲面拟合模型 海洋测绘 分区面积 控制点间距 

分 类 号：P229[天文地球—大地测量学与测量工程]