NAME
    Geo::Hex - GeoHex decoder/encoder

INSTALLATION
  To install this module, run the following commands:

    perl Makefile.PL
    make
    make test
    make install

SYNOPSIS
        use Geo::Hex;
    
        # OO-style
        my $geohex = Geo::Hex->new( version => 3 ); # v3 by default
    
        $geohex->spec_version; # => 3
    
        my ($lat, $lon, $level) = $geohex->decode( 'XM4885487' );
        my $code                = $geohex->encode( $lat, $lon, $level );
        # => XM4885487
    
        my $zone = $geohex->to_zone( 'XM4885487' );
           $zone = $geohex->to_zone( $lat, $lon, $level );
    
        # * zone object: hash value
        # $zone->code  : GeoHex code
        # $zone->level : Level
        # $zone->lat   : Latirude of given GeoHex's center point
        # $zone->lon   : Longitude of given GeoHex's center point
        # $zone->x     : Mercator X coordinate of given GeoHex's center point 
        # $zone->y     : Mercator Y coordinate of given GeoHex's center point 
    
        my $polygon = $zone->hex_coords; # return the hex coords (six points hold lat and lon)
    
    
        # Export function - GeoHex v3 by default
        ($lat, $lon, $level) = decode_geohex( $code );
        $code = encode_geohex( $lat, $lon, $level );
    
        # Explicit export function
        use Geo::Hex v => 3, qw(latlng2geohex geohex2latlng latlng2zone geohex2zone);
    
        # From latitude/longitude to hex code
        $code = latlng2geohex( $lat, $lng, $level );
            # From hex code to center latitude/longitude
        my ( $center_lat, $center_lng, $level ) = geohex2latlng( $code );

VERSION
    This is a beta version, so interfaces may be changed in future.

CLASS METHODS
  new
        $geohex = Geo::Hex->new( %option );

    Creates a new Geo::Hex::Coder object. It can take options:

    version
        The GeoHex specification vresion.

    v   The synonym to "version" option.

  spec_version
    Returns specification version.

INSTANCE METHODS
  decode
        ( $lat, $lon, $level ) = $geohex->decode( $code );

  encode
        $code = $geohex->encode( $lat, $lon, $level );

  to_zone
        $zone = $geohex->to_zone( $code );
    
        $zone = $geohex->to_zone( $lat, $lon, $level );

  spec_version
    Returns specification version.

EXPORT FUNCTIONS
  decode_geohex
        ($lat, $lon, $level) = decode_geohex( $code );

    Convert latitude/longitude to GeoHex code.

  encode_geohex
        $code = encode_geohex( $lat, $lon, $level );

    Convert GeoHex code to center latitude/longitude, and level value.

FUNCTIONS
        use Geo::Hex v => 3;

  latlng2geohex
        $code = latlng2geohex( $lat, $lon, $level );

    Same as "encode_geohex".

  geohex2latlng
        ($lat, $lon, $level) = geohex2latlng( $code );

    Same as "decode_geohex".

  latlng2zone
        $zone = latlng2zone( $lat, $lon, $level );

    Takes a location and its level, and returns GeoHex::Zone.

  geohex2zone
        $zone = geohex2zone( $code );

    Takes a geohex code and returns GeoHex::Zone.

SEE ALSO
    <https://sites.google.com/site/geohexdocs/>,
    <http://geogames.net/geohex/v3>

    Geo::Hex::V1, Geo::Hex::V2, Geo::Hex::V3, Geo::Hex::Zone

AUTHORS
    Frontend module Geo::Hex by Makamaka Hannyaharamitu

    Geo::Hex::V1 are originally written by OHTSUKA Ko-hei
    "<nene@kokogiko.net>"

    Geo::Hex::V2 are originally written by OHTSUKA Ko-hei and maintained by
    Makamaka Hannyaharamitu

    Geo::Hex::V2::XS are originally written by lestrrat

    Geo::Hex::V3 are originally written by soh335

LICENCE AND COPYRIGHT
    GeoHex by @sa2da (http://geogames.net) is licensed under Creative
    Commons BY-SA 2.1 Japan License.

    Geo::Hex - Copyright 2011 Makamaka Hannyaharamitu

    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.