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TRANSVERSEMERCATORPROJ(1)   GeographicLib Utilities  TRANSVERSEMERCATORPROJ(1)

NAME
       TransverseMercatorProj -- perform transverse Mercator projection

SYNOPSIS
       TransverseMercatorProj [	-s | -t	] [ -l lon0 ] [	-k k0 ]	[ -r ] [ -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
       Perform the transverse Mercator projections.  Convert geodetic
       coordinates to transverse Mercator coordinates.	The central meridian
       is given	by lon0.  The longitude	of origin is the equator.  The scale
       on the central meridian is k0.  By default an implementation of the
       exact transverse	Mercator projection is used.

       Geodetic	coordinates are	provided on standard input as a	set of lines
       containing (blank separated) latitude and longitude (decimal degrees or
       degrees,	minutes, seconds); for detils on the allowed formats for
       latitude	and longitude, see the "GEOGRAPHIC COORDINATES"	section	of
       GeoConvert(1).  For each	set of geodetic	coordinates, the corresponding
       projected easting, x, and northing, y, (meters) are printed on standard
       output together with the	meridian convergence gamma (degrees) and scale
       k.  The meridian	convergence is the bearing of the y axis measured
       clockwise from true north.

OPTIONS
       -s  use the sixth-order Krueger series approximation to the transverse
	   Mercator projection instead of the exact projection.

       -t  use the exact algorithm with	the "EXTENDED DOMAIN".

       -l lon0
	   specify the longitude of origin lon0	(degrees, default 0).

       -k k0
	   specify the scale k0	on the central meridian	(default 0.9996).

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

       -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.  If the exact algorithm is used, f
	   must	be positive.

       -w  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 lengths (in meters).  For
	   latitudes and longitudes (in	degrees), the number of	digits after
	   the decimal point is	prec + 5.  For the convergence (in degrees)
	   and scale, the number of digits after the decimal point is prec +
	   6.

       --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.

EXTENDED DOMAIN
       The exact transverse Mercator projection	has a branch point on the
       equator at longitudes (relative to lon0)	of +/- (1 - e) 90, where e is
       the eccentricity	of the ellipsoid.  The standard	convention for
       handling	this branch point is to	map positive (negative)	latitudes into
       positive	(negative) northings y;	i.e., a	branch cut is placed on	the
       equator.	 With the extended domain, the northern	sheet of the
       projection is extended into the south hemisphere	by pushing the branch
       cut south from the branch points.  See the reference below for details.

EXAMPLES
	  echo 0 90 | TransverseMercatorProj
	  => 25953592.84 9997964.94 90 18.40
	  echo 260e5 100e5 | TransverseMercatorProj -r
	  => -0.02 90.00 90.01 18.48

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

AUTHOR
       TransverseMercatorProj was written by Charles Karney.

SEE ALSO
       The algorithms for the transverse Mercator projection are described in
       C. F. F.	Karney,	Transverse Mercator with an accuracy of	a few
       nanometers, J. Geodesy 85(8), 475-485 (Aug. 2011); DOI
       <https://dx.doi.org/10.1007/s00190-011-0445-3>; preprint
       <http://arxiv.org/abs/1002.1417>.  The explanation of the extended
       domain of the projection	with the -t option is given in Section 5 of
       this paper.

HISTORY
       TransverseMercatorProj was added	to GeographicLib,
       <http://geographiclib.sourceforge.net>, in 2009-01.  Prior to version
       1.9 it was called TransverseMercatorTest	(and its interface was
       slightly	different).

GeographicLib 1.46		  2016-02-14	     TRANSVERSEMERCATORPROJ(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXTENDED DOMAIN | EXAMPLES | ERRORS | AUTHOR | SEE ALSO | HISTORY

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