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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-separa-
     tor linesep ] [ --output-file outfile ]

DESCRIPTION
     Perform  one  of two conic projections geodesics.	Convert geodetic coordi-
     nates 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  (Al-
     bers equal area).	The (azimuthal) scale on the standard parallels is k1.

     Geodetic  coordinates are provided on standard input as a set of lines con-
     taining (blank separated) latitude and longitude (decimal	degrees  or  de-
     grees,  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 Al-
     bers 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 projec-
     tion (the standard latitudes equal and  opposite)	and  the  polar  stereo-
     graphic  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  par-
     allel 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 el-
	 lipsoid.   A  simple  fraction,  e.g., 1/297, is allowed for f.  By de-
	 fault, 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  semi-
	 colon) 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 be-
     ginning  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.source-
     forge.io>, in version 1.9.

GeographicLib 2.2		   2022-12-13			    CONICPROJ(1)

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