screen.txt

坐标转换源码：直角坐标系到大地坐标系之间可以方便相互转换

a-train% ./xyz2llh
xyz2llh(1.5 02/02/07): Converts X Y Z to lat, lon and ellipsoid hgt
Usage: xyz2llh X Y Z
  options:
           -d print deg min sec rather than decimal degrees.
           -h prints this message.
           -r = input coordinates are lat, lon, hgt,
                output coordinates will be X, Y, Z.
           -w longitudes are west rather than east longitude.




a-train% cat run1
#
./xyz2llh -w -r 38.889467 077.035239 149.2


a-train% ./run1
 1115287.6047 -4844432.9443  3982867.0809





a-train% cat run2
#
./xyz2llh -w -d 1149298.644 -4827706.774 3993217.203
a-train% ./run2
 39  0 37.03253  76 36 33.28940   20.25058917




a-train% cat run3
#
./xyz2llh -w -r -14.5480481694 168.1455008722 25.61

a-train% ./run3
-6043268.9652 -1268505.0274 -1591753.0728