Geo::Coordinates::ETRSTM35FIN - converts Finnish ETRS-TM35FIN coordinate system from/to WGS84 coordinate system
use Geo::Coordinates::ETRSTM35FIN; my $gce = new Geo::Coordinates::ETRSTM35FIN; # ETRS-TM35FIN coordinates to WGS84 coordinates my ( $lat, $lon ) = $gce->ETRSTM35FINxy_to_WGS84lalo('6717563', '2545107'); # WGS84 coordinates to ETRS-TM35FIN coordinates my ( $x, $y ) = $gce->WGS84lalo_to_ETRSTM35FINxy('60.22543759', '24.85437044'); # Is the given location in the defined ETRS-TM35FIN boundaries? if ($gce->is_defined_ETRSTM35FINxy($x, $y)) { print "You gave valid ETRS-TM35FIN coordinates"; }
This module converts WGS84 coordinate system to/from the Finnish ETRS-TM35FIN coordinate system. The coordinate system covers Finland and surroundings. The coordinate system and the transformation functions are defined in the Finnish JHS-Public Administration Recommendation number 154.
Transforms ETRS-TM35FIN coordinates (x = northing, y = easting) to WGS84 coordinates. Returns WGS84 latitude and longitude in a two-value array (latitude, longitude). If the given ETRS coordinates are out of defined bounds (see is_defined_ETRSTM35FIN) the return values are undefined.
Transforms WGS84 coordinates to ETRS-TM35FIN coordinates. Returns transformed coordinates in a two-value array (x = northing, y = easting). If the given WGS84 values are out of the defined bounds (see is_defined_WGS84lalo) the return values are undefined.
Checks whether given ETRS-TM35FIN coordinates (x = northing, y = easting) are in the area where the ETRS-TM35FIN coordinate system is defined. The boundaries are defined in L<http://spatialreference.org/ref/epsg/3067/>. Returns true if the coordinates are in the defined area, otherwise false.
Checks whether given WGS84 coordinates are in the area where the ETRS-TM35FIN coordinate system is defined. The boundaries are defined in L<http://spatialreference.org/ref/epsg/3067/>. Returns true if the coordinates are in the defined area, otherwise false.
Please report to author.
Official ETRS-TM35FIN definition http://www.jhs-suositukset.fi/web/guest/jhs/projects/jhs154 (in Finnish). The conversion functions are in appendix 1.
Good explanation about the Finnish coordinate system and its history http://www.kolumbus.fi/eino.uikkanen/geodocsgb/ficoords.htm.
On-line transformations between different coordinate systems http://kansalaisen.karttapaikka.fi/koordinaatit/koordinaatit.html?lang=en.
Former Finnish coordinate system conversion routines Geo::Coordinates:KKJ.
Perl port and CPAN package Matti Lattu, <matti@lattu.biz>
The conversion formulae have been acquired from a Python module from Olli Lammi http://olammi.iki.fi/sw/fetch_map/.
The Perl realization follows closely Geo::Coordinates::KKJ by Josep Roca.
Thanks for GIS specialist PhD Tuuli Toivonen (University of Helsinki) for her essential support.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.1 or, at your option, any later version of Perl 5 you may have available.
Copyright (C) 2010-2011 Olli Lammi and Matti Lattu
To install Geo::Coordinates::ETRSTM35FIN, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Geo::Coordinates::ETRSTM35FIN
CPAN shell
perl -MCPAN -e shell install Geo::Coordinates::ETRSTM35FIN
For more information on module installation, please visit the detailed CPAN module installation guide.