摘要
油气田大型站址、厂区的建设采用独立坐标系,施工利用的真正高程成果只是各控制点的高差。在小区域内只要证明似大地水准面与参考椭球面是大致平行的,那么在任一起算面上求高差都是相同的。大地高的直接应用,省略了水准测量和高程拟合换算成正常高的步骤,并保证了精度。
The construction of large-scale stations and plants adopt independent coordinate system in oil and gas field,and using really height difference between control points in construction. If the geoid and reference ellipsoid is roughly parallel, then the eight difference can be the same based on either of them. The direct application of GPS hight omits leveling and height fitting , in addition ensures the accuracy.
出处
《黑龙江水专学报》
2008年第3期44-46,共3页
Journal of Heilongjiang Hydraulic Engineering College
关键词
大地高
小区域
直接应用
高程拟合
GPS hight
small region
direct application
height fitting
