Geohash algorithm and point-golang for the nearest region

This is a creation in Article, where the information may have evolved or changed.

The Geohash algorithm and the point of the nearest region are used to encapsulate these two algorithms into the Golang package, which is useful when writing the LBS service.

Https://github.com/gansidui/geohash

Https://github.com/gansidui/nearest

Gohash

package mainimport (    "fmt"    "github.com/gansidui/geohash")func main() {    latitude := 39.92324    longitude := 116.3906    precision := 5    hash, box := geohash.Encode(latitude, longitude, precision)    fmt.Println(hash)    fmt.Println(box.MinLat, box.MaxLat, box.MinLng, box.MaxLng)    neighbors := geohash.GetNeighbors(latitude, longitude, precision)    for _, hash = range neighbors {        fmt.Print(hash, " ")    }}

Nearest

  Package Mainimport ("FMT" "Github.com/gansidui/nearest") func main () {near: = nearest. Newnearest () near. Setprecision (5) near. Addcoord ("A", 40.92424, 116.3906) near. Addcoord ("B", 39.93224, 116.3927) near. Addcoord ("C", 39.92484, 116.3916) near. Addcoord ("D", 39.92494, 116.3923) near. Addcoord ("E", 39.92220, 116.3915) near. Addcoord ("F", 39.92424, 117.3906) keys: = near. Querynearestsquarefromkey ("C") coordNode1, OK: = near. Getcoordnode ("C") if!ok {return} for _, Key: = Range Keys {CoordNode2, _: = near. Getcoordnode (Key) fmt. Println (key, nearest. Distancecoordnode (CoordNode1, CoordNode2))}}