geohash.go
func DecodeCenter(hash string) (lat, lng float64) {
	box := BoundingBox(hash)
	return box.Center()
}
func DecodeCenter(hash string) (lat, lng float64) {
	box := BoundingBox(hash)
	return box.Center()
}
func DecodeCenter ( hash string ) ( lat , lng float64 ) { box := BoundingBox ( hash ) return box . Center ( ) }
// DecodeCenter decodes the string geohash to the central point of the bounding box.
DecodeCenter decodes the string geohash to the central point of the bounding box .