NAME

       TransverseMercatorProj -- perform transverse Mercator projection

SYNOPSIS

       TransverseMercatorProj [ -s | -t ] [ -l lon0 ] [ -k k1 ] [ -r ] [ -e a f ] [ --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 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 exact algorithm with the EXTENDED DOMAIN.

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

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

       --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.

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.  Geod  85(8),  475-485  (Aug.  2011);  DOI
       http://dx.doi.org/10.1007/s00190-011-0445-3    <http://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.sf.net>, in 2009-01.   Prior  to
       version 1.9 it was called TransverseMercatorTest (and its interface was slightly different).

GeographicLib 1.21                                 2012-04-24                          TRANSVERSEMERCATORPROJ(1)