方域近区地改的多面体解析法

以往所采用的圆域扇形柱体近区地改方法,都存在一定的局限和不足,它们难于模拟复杂地形,因而精度较低。本文提出方域近区地改的多面体解析法,采用三角形拟合地形,地改域为方形,使计算精度大为提高,且计算易于实现。文中还给出了几个对比实例,说明本方法比圆域扇形近区地改的精度至少可提高10倍以上。该方法也可适用于中远区高精度地改计算。

POLYHEDRAL ANALYTIC METHOD FOR SQUARE DOMAINVICINITY-AREA TERRAIN CORRECTION

The round domain fan-shaped column vicinity-area terrain correction me thods used previously all show certain limitations and drawbacks in that they usually fail to simulate complex terrains and therefore suffer from relatively low precision.A polyhedral analytical method for square domain vicinity-area terrain correction is put forward in this paper. By using triangle to fit the terrain and adopting square as terrain correction domain, the calculation precison is greatly raised and the calculation is readily realized. A few examples, given in this paper demonstrate that the precision of this method is at least over ten times higher than that of the round domain fan-shaped vicinity area terrain correction.This method also applies to medium-distant area high precision terrain correction calculation.