曲线5大桩中桩(近似)坐标计算实例

+180-(29-54-36)÷3Р=178-02-49Р、HZ→YH的弦长:=Р =98.789Р、YH点的坐标:=+×Р =50334.751+98.789×(178-02-49)Р =50236.019Р=+×Р =52394.950+98.789× (178-02-49.43)Р =52398.317Р(7)、通过YH点计算圆心O点、QZ点的坐标来最后验证QZ点的坐标是否正确,计算步骤: Р、YH→圆心O的方位角:=+180--90Р=8-01-01+180-29-54-36-90Р=68-06-25Р、弦长R=95.78Р、圆心O的坐标:=+R×Р =50236.019+95.78×(68-06-25)Р =50271.733Р=+R×Р =52398.317+95.78× (68-06-25.2)Р =52487.189Р(8)、QZ点的坐标计算步骤:Р、圆心O→QZ2点的方位角:РYH→QZ所对应的弧长:=K23+390.865- K23+368.317=22.548Р弧长所对应的圆心角: 根据弧长公Р=→===13-29-18Р=+180-=68-06-25+180-13-29-18Р=234-37-07Р、弦长R=95.78Р、QZ的坐标:=+R×Р =50271.733+95.78×(234-37-07)Р =50216.275Р=+R×sinР =52487.189+95.78×sin(234-37-07)Р =52409.098Р=50216.258;=52409.114Р=(+)÷2=(50216.258+50216.275)÷2=50216.267Р=(+)÷2=(52409.114+52409.098)÷2=52409.106Р结论:△X=-0.017m,△Y=0.016m说明计算正确。Р编辑程序计算:=50216.267,=52409.101