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geohash's Introduction

Build Status

52位GeoHash算法,精度约0.6米,查找附近点,广泛用于需要基于LBS搜索的场景,例如滴滴、微信、陌陌、美团等.

功能

  • 二维坐标转一维长整形
  • 根据距离搜索目标附近9个(8个相邻区域和1个中心区域)候选区域
  • 计算坐标之间的距离(跟实际的百度导航距离有偏差)

精度

GeoHash长度 正方形边长(米)
52 0.597
50 1.193
... ...
32 610.984
30 1221.969
... ...

Gradle

repositories {
  jcenter()
}

dependencies {
  compile 'com.github.wenhao:geohash:1.0.0'
}

Maven

<dependency>
  <groupId>com.github.wenhao</groupId>
  <artifactId>geohash</artifactId>
  <version>1.0.0</version>
</dependency>

例子

结合Redis的例子

Copyright and license

Copyright 2016 Wen Hao

Licensed under Apache License

geohash's People

Contributors

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Watchers

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