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lib/Geo/Code.pm  view on Meta::CPAN

package Geo::Code;

use 5.006;
use warnings;
use Math::BigInt lib => 'GMP';
#need Math::BigInt with GMP library support for precision integer arithmetic.  otherwise perl returns things like 7-6 = 0.999999999999999
#numlat=7, numlon=6, xy=13, yx=0.999999999999999
#binlat=1101, binlon=0
#
use constant DEBUG    => 0;
use constant BASEN    => 146300;
use constant BASEA    => 36;
use constant PADD     => 282699884614999;
use constant ALPHANUMERIC         => [ 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z ];
use constant GEONAMETRIPLE		=> [ ZERO,MELOM,GEIER,OOSTBURG,COLOA,OMACHI,NORRI,LUMAI,KOUMA,IMONO,MCOJE,GADIN,ANGIA,IMATA,BASET,JARPLUND,CAIUA,LWOWEK,GUIPA,OWKAK,ABED,DONGGUAN,PASSE,KAPESTAN,MALSFELD,TABAAN,KITHOR,CAMPANET,ULALA,CAILA,TOMKI,THMEI,ZIHAR...
sub new {
    my $class = shift;
    my $self = {
    };
    bless ($self, $class);
    return $self;
}

sub geodata {
  my $self = shift;
  $self->{geodata} = $_[0] if defined $_[0];
  return $self->{geodata};
}

sub geocode {
  my $self    = shift;
  my %params = @_;
	my $lat = $params{lat} if defined $params{lat};
	my $lon = $params{lon} if defined $params{lon};
	my $code = uc $params{gc} if defined $params{gc}; #Geo::Code is case insensitive
	my $geo3name = $params{geoname} if defined $params{geoname};
	if (defined $lat && defined $lon) {
	if ($geo3name) {
	  $self->ngcode($lat,$lon,$geo3name);
	} else {
	  $self->gcode($lat,$lon);
	}
	} else {
	  $self->gll($code);
	}
	  my $geodata    = $self->geodata;
	  return $self->geodata;
}

sub gcode {
  my $self        = shift;
  my ($lat,$lon) = @_;
  my $geodata = &lltodec($lat,$lon);
  return $self->geodata($geodata);
}

sub gll {
	my $self        = shift;
	my $code = shift;
	my $geodata = &dencd($code);
	return $self->geodata($geodata);
}

sub ngcode {
  my $self        = shift;
  my ($lat,$lon,$geo3name) = @_;
  my $geodata = &lltodec($lat,$lon,$geo3name);
  return $self->geodata($geodata);
}



sub nencd {
        my $decll = shift;
        my $base = Math::BigInt->new(BASEN);