基于海图数据的水下岸坡插值精度分析对比研究  

A comparative study on interpolation accuracy of underwater slope terrain based on sea chart data

作　　者：徐洋 战超[1,2] 王庆 于君宝[2] 栗云召 董程 XU Yang;ZHAN Chao;WANG Qing;YU Jun-bao;LI Yun-zhao;DONG Cheng(Coastal Institute,Ludong University,Yantai 264025,China;Shandong Provincial"Thirteen-Five"Key Laboratory of Universities"the Key Laboratoryof Coastal Wetland Conservation and Ecological Restoration",Institute for Advanced Study of Coastal Ecology,Ludong University,Yantai 264025,China)

机构地区：[1]鲁东大学海岸研究所,山东烟台264025 [2]鲁东大学滨海生态高等研究院山东省“十三五”高校重点实验室“滨海湿地保育与生态修复重点实验室”,山东烟台264025

出　　处：《海洋通报》2019年第6期632-639,共8页Marine Science Bulletin

基　　金：国家重点研发计划项目北方典型河口湿地生态修复与产业化技术（2017YFC0505902）;国家自然科学基金（41471005）;国家科学基金—山东联合基金（U1706220）

摘　　要：数字高程模型是研究水下岸坡冲淤变化的一种重要手段。不同的插值方法和像元大小都会对数字高程模型的精度产生影响,从而导致冲淤分析结果的变化。本研究使用了六种常用的插值方法(ANUDEM、反距离函数法、克里金法、自然邻域法、样条函数法、不规则三角网转栅格法)对莱州湾和烟台港不同年份和尺度的水深数据进行了插值,计算了均方根预测误差、源数据残差均方根误差、残差均值、残差最大值和残差最小值等精度计算指标。结果表明ANUDEM和自然邻域法的均方根预测误差和源数据残差均方根误差均小于1 m。ANUDEM和自然邻域法对不同尺度的水下岸坡数据插值有着较好的适用性。Digital Elevation Model(DEM)is an important method for underwater slope erosion-deposition variation research.The interpolation method and pixel size both have effects on the accuracy of DEM,which have great impacts on the conclusion of erosional and depositional variation.Six interpolation methods(ANUDEM,IDW,Kriging,Natural Neighbour,Spline,TIN to Raster)were used for different years and scales water depth data about the Laizhou Bay and Yantai Port.RMSPE,RMS,mean max and min absolute value of residual were calculated using R language.The erosional and depositional volumes of different methods were also calculated.The RMSPE and RMSE values of ANUDEM and Natural Neighbour are both less than 1 meter.The experiment result shows that both ANUDEM and Natural Neighbour methods have good applicability for underwater slope interpolation on different position and multi-resolution conditions.

关 键 词：数字高程模型 水下岸坡 地形插值 精度评定 海图 

分 类 号：TV148.6[水利工程—水力学及河流动力学]