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
Key words
grid/quadratic surface fitting model/marine surveying and mapping/partition area/control point spacing
维普
万方数据