geohash

type Direction int

type GeoHash interface {
	Hash() uint64
	Coordinates() (latitude, longitude float64)

	// 1..64, the higher the better
	Precision() uint
	GetInPrecision(precision uint) GeoHash

	// will return adjacent hash in the precision the hash is
	GetAdjacent(dir Direction) GeoHash

	GetNeighbors() [8]GeoHash

	GetHashRangesInside(radius float64) []Range
}

type Range struct {
	Min uint64
	Max uint64
}