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CONICPROJ(1)		    GeographicLib Utilities		  CONICPROJ(1)

NAME
       ConicProj -- perform conic projections

SYNOPSIS
       ConicProj ( -c |	-a ) lat1 lat2 [ -l lon0 ] [ -k	k1 ] [ -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 one of two conic	projections geodesics.	Convert	geodetic
       coordinates to either Lambert conformal conic or	Albers equal area
       coordinates.  The standard latitudes lat1 and lat2 are specified	by
       that the	-c option (for Lambert conformal conic)	or the -a option (for
       Albers equal area).  At least one of these options must be given	(the
       last one	given is used).	 Specify lat1 =	lat2, to obtain	the case with
       a single	standard parallel.  The	central	meridian is given by lon0.
       The longitude of	origin is given	by the latitude	of minimum (azimuthal)
       scale for Lambert conformal conic (Albers equal area).  The (azimuthal)
       scale on	the standard parallels is k1.

       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	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
       projected easting, x, and northing, y, (meters) are printed on standard
       output together with the	meridian convergence gamma (degrees) and
       (azimuthal) scale k.  For Albers	equal area, the	radial scale is	1/k.
       The meridian convergence	is the bearing of the y	axis measured
       clockwise from true north.

       Special cases of	the Lambert conformal projection are the Mercator
       projection (the standard	latitudes equal	and opposite) and the polar
       stereographic projection	(both standard latitudes correspond to the
       same pole).  Special cases of the Albers	equal area projection are the
       cylindrical equal area projection (the standard latitudes equal and
       opposite), the Lambert azimuthal	equal area projection (both standard
       latitude	corresponds to the same	pole), and the Lambert equal area
       conic projection	(one standard parallel is at a pole).

OPTIONS
       -c lat1 lat2
	   use	the Lambert conformal conic projection with standard parallels
	   lat1	and lat2.

       -a lat1 lat2
	   use the Albers equal	area projection	with standard  parallels  lat1
	   and lat2.

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

       -k k1
	   specify the (azimuthal) scale k1 on the standard parallels (default
	   1).

       -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.

       -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 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.

EXAMPLES
	  echo 39.95N 75.17W | ConicProj -c 40d58 39d56	-l 77d45W
	  => 220445 -52372 1.67	1.0
	  echo 220445 -52372 | ConicProj -c 40d58 39d56	-l 77d45W -r
	  => 39.95 -75.17 1.67 1.0

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

AUTHOR
       ConicProj was written by	Charles	Karney.

HISTORY
       ConicProj	 was	     added	    to		GeographicLib,
       <https://geographiclib.sourceforge.io>, in version 1.9.

GeographicLib 2.2		  2022-12-13			  CONICPROJ(1)

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