Analysis of Influence of Boundary Points Density on Precision of Sea Plot Area

Abstract

In order to improve the area accuracy of the sea plot, the formula of the influence of the density of the graphic boundary points on the area accuracy is deduced and stripped. The conditions of the different values of the vertex angle of the boundary points to improve the area accuracy are analyzed separately. The values of the area accuracy of different sea plot under different distribution densities are deduced and simulated. The results show that the more insertion points on the Sea plot line boundary line, the higher the area accuracy. Under the condition that the boundary point accuracy is 0.1m and the error limit of the sea plot area is 100m2, when the area of the Sea plot with a width : length of 1:4 is greater than 9 hm2 and the area of the Sea plot with a width : length of 1:1 is greater than 25 hm2, it is necessary to consider the insertion point to improve the area accuracy. The maximum relative area error of the oil and cable pipeline sea plot is 3.5‰, taking into account the area accuracy of the cable pipeline sea plot and the actual workload, the insertion point interval of 100 ~ 200 m is selected. The formula and quantitative results derived in this paper can be used as a reference for the layout density of sea plot boundary sites.