Geo::Coordinates::OSGB Geo::Coordinates::OSTN02 ---------------------- Routines to convert latitude and longitude coordinates to and from transverse Mercator grid references, that are optimized for use with the British national grid. The OSGB module provides routines to convert between latitude/longitude coordinates based on the British Ordnance Survey's standard geoid model and the British National Grid. The module includes some useful extra routines to parse and format grid references in a variety of popular forms (including which Landranger map your point appears on). The second module provides an implementation of the standard transformation tables that are now used by the British Ordnance Survey to define the National Grid from GPS surveys. This module provides accurate conversion between the British National Grid and latitude/longitude coordinates based on the global WGS84 geoid model (the one used by all GPS devices, and popular mapping tools such as Google Earth). The OSTN02 data is rather large (6M bytes), and will take a few microseconds to load even on a new machine, but once loaded conversions should be reasonably quick. INSTALLATION This package installs in the regular Perl way. You don't need the C compiler and as far as I know there are no platform dependencies. Either use your local package tool, or just try [sudo] perl -MCPAN -e "install Geo::Coordinates::OSGB" For the die hards, the package can also be installed by hand; just unzip it to some temporary home, then do the usual thing: Perl Makefile.PL make make test [sudo] make install The last tests called by "make test" *will* generate some harmless warnings. The full suite of tests takes less than 2 seconds on my machine. You may or may not need sudo depending on how you have set up your system. DEPENDENCIES None. COPYRIGHT AND LICENCE Copyright (C) 2002-2013 Toby Thurston OSTN02 transformation data is freely available but remains Crown Copyright (C) 2002 This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. All feedback gratefully received.