《水利工程测量》精品课程 ●●●●● ●●●● ●●0 ●●● ●●●● 二、地球曲率对高程的影响 The Infection of Globe Curvature on Altitude △h=Bb Bh △h 2R R 场士子 XI'An University of TechnologyR D h h Bb Bb 2 2  =  = −  二、地球曲率对高程的影响 The Infection of Globe Curvature on Altitude B A a d D p ′ p b ′ b R