gamit的功能程序，座標轉換。
把笛卡爾的、球面的扥座標系座標進行互相轉換。
採用交互式。
[zhao@zhaoZhongHai test]$ tform
Program TFORM 3.14 of 2018/8/27 09:05:00 (Linux)
Specify initial coordinate characteristics:
1=Cartesian 2=Spherical 3=Geodetic 4=Local 5=Cylindrical: 2
1=Decimal 2=L-file (Deg Min Sec): 2
Input Coordinate File
(return for terminal input): lfile.2418
2418 2418_GPS N45 40 44.05964 E126 29 19.72116 6367308.0177
1=Add
2=Subtract
3=Cartesian length
4=Convert coordinate type (e.g. cartesian=>spherical)
5=Transform coordinates to another system (e.g. WGS=>SV6)
6=Estimate transformation
Specify operation: 4
Specify output coordinate characteristics:
1=Cartesian 2=Spherical 3=Geodetic 4=Local 5=Cylindrical: 3
1=Decimal 2=L-file (Deg Min Sec): 1
Output Coordinate File
(return for terminal input): zhao.txt
Datums available from gdetic.dat:
* Ellipsoid parameters and translation/rotation of datums wrt ITRF
* New format: differs from old by making non-blank first column a comment
* and allowing for rotations, scale, and rate; datum name in cols 2-6, free format thereafter
* Units are m for a and translation, mas for rotation, ppb for scale, years for rates
* Last updated by rwk 2002.9.27
Datum a 1/f dX dY dZ dXdot dYdot dZdot RX RY RZ RXdot RYdot RZdot Scale Sdo t Epoch
WGS84 6378137. 298.257223563 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
IAU95 6378136.49 298.25645 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
IER10 6378136.6 298.25642 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
NOD83 6378137. 298.257222101 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. NAD w/o NGS/GSD corrections
NAD83 6378137. 298.257222101 0.9889 -1.9074 -0.503 0.0007 -0.0001 0.0019 25.915 9.426 11.599 0.067 -0.757 -0.031 -0.93 -0.19 1997.0 NGS/GSD wrt ITRF97
WGS72 6378135. 298.26 0. 0. 4.5 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
NAD27 6378206.4 294.9786982 -12.01 -162.97 189.74 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
CLK80 6378249.145 293.465 0 0 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. English Clarke
CLI80 6378249.2 293.4660208 0 0 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. Clarke 1880 IGN
INT24 6378388. 297. 0 0 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
Enter 5-character code for datum (case insensitive):
wgs84
Selected WGS84 a=6378137.000 1/f=298.257223563
dX= 0.000 0.000 0.000
24182418 45.87125499 126.48881143 143.6413
1=Continue 2=Start over 3=Quit: 3
[zhao@zhaoZhongHai test]$
[zhao@zhaoZhongHai test]$