es - elasticsearch - aggs - bucket - geotile

世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。

问：geotile_grid有什么特点？
答：

问：geotile_grid如何使用？
答：

# 删除
DELETE /geotile_grid_test

# 映射
PUT /geotile_grid_test
{
  "mappings": {
    "properties": {
      "loc": {"type": "geo_point"}
    }
  }
}

# 索引
POST /geotile_grid_test/_bulk?routing=1&refresh
{"index": {"_id": 1}}
{"loc": "13, 15"}
{"index": {"_id": 2}}
{"loc": "14, 16"}
{"index": {"_id": 3}}
{"loc": "16, 18"}
{"index": {"_id": 4}}
{"loc": "17, 19"}
{"index": {"_id": 5}}
{"loc": "18, 20"}


# 搜索
GET /geotile_grid_test/_search?size=0
{
  "aggs": {
    "geotile_grid_aggs": {
      "geotile_grid": {
        "field": "loc",
        "precision": 8,
        "bounds": {
          "top_left": "20,10",
          "bottom_right": "14,1"
        }
      }
    }
  }
}

#结果
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 5,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  },
  "aggregations" : {
    "geotile_grid_aggs" : {
      "buckets" : [
        {
          "key" : "8/142/114",
          "doc_count" : 1
        },
        {
          "key" : "8/141/115",
          "doc_count" : 1
        },
        {
          "key" : "8/140/116",
          "doc_count" : 1
        }
      ]
    }
  }
}