Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
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 ] [ -w ]	[ -p prec ] [
       --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 details on the allowed formats for latitude and longitude, see the
       "GEOGRAPHIC COORDINATES"	section	of GeoConvert(1).  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.  In general there are multiple solutions and	the result
	   which minimizes the absolute	value of height	is returned, i.e.,
	   (latitude, longitude) corresponds to	the closest point on the
	   ellipsoid.

       -l lat0 lon0 h0
	   specifies conversions to and	from a local cartesion coordinate
	   systems with	origin lat0 lon0 h0, instead of	a geocentric
	   coordinate system.  The -w flag can be used to swap the default
	   order of the	2 geographic coordinates, provided that	it appears
	   before -l.

       -e a f
	   specify the ellipsoid via the equatorial radius, a and the
	   flattening, 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.  By default, the WGS84 ellipsoid is used, a =
	   6378137 m, f	= 1/298.257223563.

       -w  toggle the longitude	first flag (it starts off); if the flag	is on,
	   then	on input and output, longitude precedes	latitude (except that,
	   on input, this can be overridden by a hemisphere designator,	N, S,
	   E, W).

       -p prec
	   set the output precision to prec (default 6).  prec is the number
	   of digits after the decimal point for geocentric and	local
	   cartesion coordinates and for the height (in	meters).  For
	   latitudes and longitudes (in	degrees), the number of	digits after
	   the decimal point is	prec + 5.

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

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

       --output-file outfile
	   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 <https://arxiv.org/abs/1102.1215>.

AUTHOR
       CartConvert was written by Charles Karney.

HISTORY
       CartConvert was added to	GeographicLib,
       <https://geographiclib.sourceforge.io>, in 2009-02.  Prior to 2009-03
       it was called ECEFConvert.

GeographicLib 1.51		  2020-11-22			CARTCONVERT(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | ERRORS | SEE ALSO | AUTHOR | HISTORY

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=CartConvert&sektion=1&manpath=FreeBSD+13.0-RELEASE+and+Ports>

home | help