摘要
当经纬度求算实际距离时,要满足中小范围内和大范围内2点求取距离的误差要求,而误差会随着经度差增大呈非线性增长。针对此,改进经典高斯投影算法,拆分计算跨带经度的2点距离,利用经度差作为控制变量得到修正系数,对线性叠加的距离进行修正。实验结果表明,该方法能减少跨带误差,有效控制计算误差。
When two difficulties in calculating practical distance by longitude and latitude degree should satisfy the error range requested not only in small scope but also in large scope,the error will be enlarged nonlinearly as the longitude enlarged. This paper improves the classical Gauss projection algorithm,splits two points distance of computing crotch strap longitude,makes the longitude difference as a control variable to get the modification factor,amends the distance of linear superposition. Experimental result shows that this method can efficiently reduce errors between areas and control the error range effectively.
出处
《计算机工程》
CAS
CSCD
北大核心
2010年第2期244-246,251,共4页
Computer Engineering
基金
海南省自然科学基金资助项目(60897)
关键词
高斯投影
投影带
分带
最小二乘拟合
Gauss projection
projection area
zonation
Least Square（LS） fitting
