.\" -*- mode: troff; coding: utf-8 -*-
.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
.ie n \{\
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\" ========================================================================
.\"
.IX Title "Proj 3pm"
.TH Proj 3pm 2024-04-25 "perl v5.38.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
PDL::GIS::Proj \- PDL interface to the PROJ projection library.
.SH DESCRIPTION
.IX Header "DESCRIPTION"
For more information on the PROJ library, see: <http://www.proj.org/>
#line 38 "Proj.pm"
.SH FUNCTIONS
.IX Header "FUNCTIONS"
.SS get_proj_info($params_string)
.IX Subsection "get_proj_info($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.
.SS fwd_transform
.IX Subsection "fwd_transform"
.Vb 1
\&  Signature: (lonlat(n=2); [o] xy(n); char* params)
.Ve
.PP
PROJ forward transformation \f(CW$params\fR is a string of the projection
transformation parameters.
.PP
Returns a pdl with x, y values at positions 0, 1. The units are dependent
on PROJ behavior. They will be PDL\->null if an error has occurred.
.PP
Ignores bad elements of \f(CW$lat\fR and \f(CW$lon\fR, and sets the corresponding elements
of \f(CW$x\fR and \f(CW$y\fR to BAD
.PP
fwd_transform processes bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS inv_transform
.IX Subsection "inv_transform"
.Vb 1
\&  Signature: (xy(n=2); [o] lonlat(n); char* params)
.Ve
.PP
PROJ inverse transformation \f(CW$params\fR is a string of the projection
transformation parameters.
.PP
Returns a pdl with lon, lat values at positions 0, 1. The units are
dependent on PROJ behavior. They will be PDL\->null if an error has
occurred.
.PP
Ignores bad elements of \f(CW$lat\fR and \f(CW$lon\fR, and sets the corresponding elements
of \f(CW$x\fR and \f(CW$y\fR to BAD
.PP
inv_transform processes bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS proj_version
.IX Subsection "proj_version"
Returns a 3\-element list with PROJ major, minor, patch version-numbers.
.SH AUTHOR
.IX Header "AUTHOR"
Judd Taylor, Orbital Systems, Ltd.
judd dot t at orbitalsystems dot com
.SH "COPYRIGHT NOTICE"
.IX Header "COPYRIGHT NOTICE"
Copyright 2003 Judd Taylor, USF Institute for Marine Remote Sensing (judd@marine.usf.edu).
.PP
GPL Now!
.PP
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.