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¶
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
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.