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Proj(3)		      User Contributed Perl Documentation	       Proj(3)

NAME
       PDL::GIS::Proj - PDL interface to the Proj4 projection library.

DESCRIPTION
       PDL interface to the Proj4 projection library.

       For more information on the proj library, see:
       http://www.remotesensing.org/proj/

AUTHOR
       Judd Taylor, Orbital Systems, Ltd.  judd dot t at orbitalsystems dot
       com

DATE
       18 March 2003

CHANGES
   1.32 (29 March 2006) Judd Taylor
	   - Getting ready to merge this into the PDL CVS.

   1.31 (???) Judd Taylor
	   - Can't remember what was in that version

   1.30 (16 September 2003) Judd Taylor
	   - The get_proj_info() function actually works now.

   1.20 (24 April 2003) Judd Taylor
	   - Added get_proj_info().

   1.10 (23 April 2003) Judd Taylor
	   - Changed from using the proj_init() type API in projects.h to the
	   - proj_init_plus() API in proj_api.h. The old one was not that stable...

   1.00 (18 March 2003) Judd Taylor
	   - Initial version

COPYRIGHT NOTICE
       Copyright 2003 Judd Taylor, USF Institute for Marine Remote Sensing
       (judd@marine.usf.edu).

       GPL Now!

       This program is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SUBROUTINES
   fwd_transform($lon(pdl), $lat(pdl), $params)
       Proj4 forward transformation $params is a string of the projection
       transformation parameters.

       Returns two pdls for x and y values respectively. The units are
       dependant on Proj4 behavior. They will be PDL->null if an error has
       occurred.

       BadDoc: Ignores bad elements of $lat and $lon, and sets the
       corresponding elements of $x and $y to BAD

   inv_transform($x(pdl), $y(pdl), $params)
       Proj4 inverse transformation $params is a string of the projection
       transformation parameters.

       Returns two pdls for lat and lon values respectively. The units are
       dependant on Proj4 behavior. They will be PDL->null if an error has
       occurred.

       BadDoc: Ignores bad elements of $lat and $lon, and sets the
       corresponding elements of $x and $y to BAD

   get_proj_info($params_string)
       Returns a string with information about what parameters proj will
       actually use, this includes defaults, and +init=file stuff. It's the
       same as running 'proj -v'. It uses the proj command line, so it might
       not work with all shells. I've tested it with bash.

perl v5.14.1			  2011-07-26			       Proj(3)

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