Calculate adjacent/2 geohash in ordinal direction ["n","s","e","w"].

Deals with boundary cases when adjacent is not of the same prefix.

Examples

iex> Geohash.adjacent("abx1","n")
"abx4"copy

Calculates bounds for a given geohash.

Examples

iex> Geohash.bounds("u4pruydqqv")
%{
  min_lon: 10.407432317733765,
  min_lat: 57.649109959602356,
  max_lon: 10.407443046569824,
  max_lat: 57.649115324020386
}copy

Decodes given geohash to a coordinate pair.

Examples

iex> {_lat, _lng} = Geohash.decode("ezs42")
{42.605, -5.603}copy

Decodes given geohash to a bitstring.

Examples

iex> Geohash.decode_to_bits("ezs42")
<<0b0110111111110000010000010::25>>copy

Encodes given coordinates to a geohash of length precision.

Examples

iex> Geohash.encode(42.6, -5.6, 5)
"ezs42"copy

Encodes given coordinates to a bitstring of length bits_length.

Examples

iex> Geohash.encode_to_bits(42.6, -5.6, 25)
<<0b0110111111110000010000010::25>>copy

Calculate adjacent hashes for the 8 touching neighbors/1.

Examples

iex> Geohash.neighbors("abx1")
%{
  "n" => "abx4",
  "s" => "abx0",
  "e" => "abx3",
  "w" => "abwc",
  "ne" => "abx6",
  "se" => "abx2",
  "nw" => "abwf",
  "sw" => "abwb"
}copy