Naqsha.Geometry.Coordinate.GeoHash

This module implements the geohash encoding of geo-locations. https://en.wikipedia.org/wiki/Geohash. To try out geohash encoding on web visit http://geohash.org

Documentation

data GeoHash

The encoding of geo-coordinates as a geohash string. Currently, the encoding supports 24 base32 digits of geo hash value which means we loose about 4-bits of accuracy w.r.t the representation of angles in the library. However, this loss is rather theoretical as the angular error that results from such loss is so insignificant that for all practical purposes, this accuracy is good enough --- GPS devices will have much greater errors. The quantity accuracy gives the number of bits of precision supported by the geohash implementation exposed here. As expected GeoHash implementations here will have problems at regions close to the poles.

Instances

Eq GeoHash

Methods

(==) :: GeoHash -> GeoHash -> Bool

(/=) :: GeoHash -> GeoHash -> Bool

Ord GeoHash

Methods

compare :: GeoHash -> GeoHash -> Ordering

(<) :: GeoHash -> GeoHash -> Bool

(<=) :: GeoHash -> GeoHash -> Bool

(>) :: GeoHash -> GeoHash -> Bool

(>=) :: GeoHash -> GeoHash -> Bool

max :: GeoHash -> GeoHash -> GeoHash

min :: GeoHash -> GeoHash -> GeoHash

Show GeoHash

Methods

showsPrec :: Int -> GeoHash -> ShowS

show :: GeoHash -> String

showList :: [GeoHash] -> ShowS

IsString GeoHash

Methods

fromString :: String -> GeoHash

encode :: Geo -> GeoHash

Encode a geo-location into its GeoHash string.

decode :: GeoHash -> Geo

Decode the geo-location from its GeoHash string.

accuracy :: Int

Precision of encoding measured in bits.

toByteString :: GeoHash -> ByteString

Convert the geo hash to bytestring.