CARTCONVERT(1)						      GeographicLib Utilities						    CARTCONVERT(1)

NAME

       CartConvert -- convert geodetic coordinates to geocentric or local cartesian

SYNOPSIS

       CartConvert [ -r ] [ -l lat0 lon0 h0 ] [ -e a f ] [ --comment-delimiter commentdelim ] [ --version | -h | --help ] [ --input-file infile |
       --input-string instring ] [ --line-separator linesep ] [ --output-file outfile ]

DESCRIPTION

       Convert geodetic coordinates to either geocentric or local cartesian coordinates.  Geocentric coordinates have the origin at the center of
       the earth, with the z axis going thru the north pole, and the x axis thru latitude = 0, longitude = 0.  By default, the conversion is to
       geocentric coordinates.	Specifying -l lat0 lon0 h0 causes a local coordinate system to be used with the origin at latitude = lat0,
       longitude = lon0, height = h0, z normal to the ellipsoid and y due north.

       Geodetic coordinates are provided on standard input as a set of lines containing (blank separated) latitude, longitude (decimal degrees or
       degrees, minutes and seconds), and height above the ellipsoid (meters).	For each set of geodetic coordinates, the corresponding cartesian
       coordinates x, y, z (meters) are printed on standard output.

OPTIONS

       -r  perform the reverse projection.  x, y, z are given on standard input and each line of standard output gives latitude, longitude,
	   height.

       -e  specify the ellipsoid via a f; the equatorial radius is a and the flattening is f.  Setting f = 0 results in a sphere.  Specify f < 0
	   for a prolate ellipsoid.  A simple fraction, e.g., 1/297, is allowed for f.	(Also, if f > 1, the flattening is set to 1/f.)  By
	   default, the WGS84 ellipsoid is used, a = 6378137 m, f = 1/298.257223563.

       --comment-delimiter
	   set the comment delimiter to commentdelim (e.g., "#" or "//").  If set, the input lines will be scanned for this delimiter and, if
	   found, the delimiter and the rest of the line will be removed prior to processing and subsequently appended to the output line
	   (separated by a space).

       --version
	   print version and exit.

       -h  print usage and exit.

       --help
	   print full documentation and exit.

       --input-file
	   read input from the file infile instead of from standard input; a file name of "-" stands for standard input.

       --input-string
	   read input from the string instring instead of from standard input.	All occurrences of the line separator character (default is a
	   semicolon) in instring are converted to newlines before the reading begins.

       --line-separator
	   set the line separator character to linesep.  By default this is a semicolon.

       --output-file
	   write output to the file outfile instead of to standard output; a file name of "-" stands for standard output.

EXAMPLES

	  echo 33.3 44.4 6000 | CartConvert
	  => 3816209.60 3737108.55 3485109.57
	  echo 33.3 44.4 6000 | CartConvert -l 33 44 20
	  => 37288.97 33374.29 5783.64
	  echo 30000 30000 0 | CartConvert -r
	  => 6.483 45 -6335709.73

ERRORS

       An illegal line of input will print an error message to standard output beginning with "ERROR:" and causes CartConvert to return an exit
       code of 1.  However, an error does not cause CartConvert to terminate; following lines will be converted.

SEE ALSO

       The algorithm for converting geocentric to geodetic coordinates is given in Appendix B of C. F. F. Karney, Geodesics on an ellipsoid of
       revolution, Feb. 2011; preprint <http://arxiv.org/abs/1102.1215>.

AUTHOR

       CartConvert was written by Charles Karney.

HISTORY

       CartConvert was added to GeographicLib, <http://geographiclib.sf.net>, in 2009-02.  Prior to 2009-03 it was called ECEFConvert.

GeographicLib 1.21						    2012-04-24							    CARTCONVERT(1)