1Proj(3)               User Contributed Perl Documentation              Proj(3)
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NAME

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

9       PDL interface to the Proj4 projection library.
10
11       For more information on the proj library, see:
12       http://www.remotesensing.org/proj/
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AUTHOR

15       Judd Taylor, Orbital Systems, Ltd.  judd dot t at orbitalsystems dot
16       com
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DATE

19       18 March 2003
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CHANGES

22   1.32 (29 March 2006) Judd Taylor
23           - Getting ready to merge this into the PDL CVS.
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25   1.31 (???) Judd Taylor
26           - Can't remember what was in that version
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28   1.30 (16 September 2003) Judd Taylor
29           - The get_proj_info() function actually works now.
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31   1.20 (24 April 2003) Judd Taylor
32           - Added get_proj_info().
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34   1.10 (23 April 2003) Judd Taylor
35           - Changed from using the proj_init() type API in projects.h to the
36           - proj_init_plus() API in proj_api.h. The old one was not that stable...
37
38   1.00 (18 March 2003) Judd Taylor
39           - Initial version
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42       Copyright 2003 Judd Taylor, USF Institute for Marine Remote Sensing
43       (judd@marine.usf.edu).
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45       GPL Now!
46
47       This program is distributed in the hope that it will be useful, but
48       WITHOUT ANY WARRANTY; without even the implied warranty of
49       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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SUBROUTINES

52   fwd_transform($lon(pdl), $lat(pdl), $params)
53       Proj4 forward transformation $params is a string of the projection
54       transformation parameters.
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56       Returns two pdls for x and y values respectively. The units are
57       dependant on Proj4 behavior. They will be PDL->null if an error has
58       occurred.
59
60       BadDoc: Ignores bad elements of $lat and $lon, and sets the
61       corresponding elements of $x and $y to BAD
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63   inv_transform($x(pdl), $y(pdl), $params)
64       Proj4 inverse transformation $params is a string of the projection
65       transformation parameters.
66
67       Returns two pdls for lat and lon values respectively. The units are
68       dependant on Proj4 behavior. They will be PDL->null if an error has
69       occurred.
70
71       BadDoc: Ignores bad elements of $lat and $lon, and sets the
72       corresponding elements of $x and $y to BAD
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74   get_proj_info($params_string)
75       Returns a string with information about what parameters proj will
76       actually use, this includes defaults, and +init=file stuff. It's the
77       same as running 'proj -v'. It uses the proj command line, so it might
78       not work with all shells. I've tested it with bash.
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82perl v5.12.3                      2011-03-31                           Proj(3)
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