NAME
Geo::Coder::Free::Maxmind - Provides a geocoding functionality using the MaxMind and GeoNames databases
VERSION
Version 0.08
SYNOPSIS
use Geo::Coder::Free::MaxMind;
my $geocoder = Geo::Coder::Free::MaxMind->new();
my $location = $geocoder->geocode(location => 'Ramsgate, Kent, UK');DESCRIPTION
Geo::Coder::Free::MaxMind provides an interface to free databases.
Refer to the source URL for licencing information for these files: cities.csv is from https://www.maxmind.com/en/free-world-cities-database; admin1.db is from http://download.geonames.org/export/dump/admin1CodesASCII.txt; admin2.db is from http://download.geonames.org/export/dump/admin2Codes.txt;
See also http://download.geonames.org/export/dump/allCountries.zip
To significantly speed this up, gunzip cities.csv and run it through the db2sql script to create an SQLite file.
METHODS
new
$geocoder = Geo::Coder::Free::MaxMind->new();Takes one optional parameter, directory, which tells the library where to find the files admin1db, admin2.db and cities.[sql|csv.gz]. If that parameter isn't given, the module will attempt to find the databases, but that can't be guaranteed
geocode
$location = $geocoder->geocode(location => $location);
print 'Latitude: ', $location->lat(), "\n";
print 'Longitude: ', $location->long(), "\n";
# TODO:
# @locations = $geocoder->geocode('Portland, USA');
# diag 'There are Portlands in ', join (', ', map { $_->{'state'} } @locations);reverse_geocode
$location = $geocoder->reverse_geocode(latlng => '37.778907,-122.39732');Returns a string, or undef if it can't be found.
ua
Does nothing, here for compatibility with other geocoders
AUTHOR
Nigel Horne <njh@bandsman.co.uk>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
BUGS
Lots of lookups fail at the moment.
The MaxMind data only contains cities.
Can't parse and handle "London, England".
The database contains Canadian cities, but not provinces, so a search for "New Brunswick, Canada" won't work
The GeoNames admin databases are in this class, they should be in Geo::Coder::GeoNames.
The data at https://github.com/apache/commons-csv/blob/master/src/test/resources/perf/worldcitiespop.txt.gz?raw=true are 7 years out of date, and are unconsistent with the Geonames database.
SEE ALSO
VWF, MaxMind and geonames.
LICENSE AND COPYRIGHT
Copyright 2017-2019 Nigel Horne.
The program code is released under the following licence: GPL for personal use on a single computer. All other users (including Commercial, Charity, Educational, Government) must apply in writing for a licence for use from Nigel Horne at `<njh at nigelhorne.com>`.
This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com/en/home.