geohash算法以及求最邻近区域的点, 对这两个算法封装成了golang package, 写LBS服务程序的时候有用。
https://github.com/gansidui/geohash
https://github.com/gansidui/nearest
package main import ( "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, " ") } }
package main import ( "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)) } }