摘要
通过一个实例得到两个重要的结论 :1.计算地形起伏改正时应该使用公式δN =πGρh2 pγ - Gρ6γ (h3 -h3 p)l3 dxdy而不能用公式δN =Gργ (h -hp)l dxdy - Gρ6γ (h -hp) 3l3 dxdy ;2 .在海拔较低的地区 ,即使地形起伏比较大 ,但是地形起伏改正数却很小 。
A practical example was illuminated and two important conclusions were derived that 1.the mathematic model of terrain-correction should beδN= π Gρh 2 pγ-Gρ6γ(h 3-h 3 p)l 3dxdy, rather than ;δN=Gργ(h-h p)ldxdy-Gρ6γ(h-h p) 3l 3dxdy 2.in these area with lower elevation , although the undulation is big , the quantity of terrain-correction is very small, so it is not necessary to consider terrain affection.
出处
《现代测绘》
2004年第1期17-19,共3页
Modern Surveying and Mapping
