johannessen / cs2cs-perl

Perl IPC interface to PROJ cs2cs

Geo::LibProj::cs2cs

This distribution is a Perl interprocess communication interface to the cs2cs utility, which is a part of the PROJ coordinate transformation library.

Unlike Geo::Proj4, this module is pure Perl. It does require the PROJ library to be installed, but it does not use the PROJ API via XS. Instead, it communicates with the cs2cs utility using the standard input/output streams, just like you might do at a command line. Data is formatted using sprintf and parsed using regular expressions.

As a result, this module may be expected to work with many different versions of the PROJ library, whereas Geo::Proj4 is limited to version 4 (at time of this writing). However, this module is definitely less efficient and possibly also less robust with regards to potential changes to the cs2cs input/output format.

Installation

Released versions of Geo::LibProj::cs2cs may be installed via CPAN:

cpanm Geo::LibProj::cs2cs

To install a development version from this repository, run the following steps:

1. git clone https://github.com/johannessen/cs2cs-perl && cd cs2cs-perl
2. dzil build (requires Dist::Zilla)
3. cpanm <archive>.tar.gz

cs2cs-perl's Issues

Consider FFI instead of XS

Just a comment on the possible XS interface noted in the POD.

If you do implement such a direct interface, it is probably simpler to use FFI via FFI::Platypus instead of XS. See for example Geo::GDAL::FFI.

Regards,
Shawn.