Elasticsearch地理位置搜索不返回里程单位的结果

Question

im using elasticsearch to return business near a users location.

If i search with a distance unit of kilometer 'km' i get expected results but if i use miles 'm' it return 0 hits

example of km request with hits

{
  "sort" : [
      {
          "_geo_distance" : {
              "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
              }, 
              "order" : "asc",
              "unit" : "km"
          }
      }
  ],
  "query": {
    "filtered" : {
        "query" : {
            "match_all" : {}
        },
        "filter" : {
            "geo_distance" : {
                "distance" : "1km",
                "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
                }
            }
        }
    }
  }
}

1km = 0.6 miles so this query should return the same number of results as above but returns 0

{
  "sort" : [
      {
          "_geo_distance" : {
              "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
              }, 
              "order" : "asc",
              "unit" : "m"
          }
      }
  ],
  "query": {
    "filtered" : {
        "query" : {
            "match_all" : {}
        },
        "filter" : {
            "geo_distance" : {
                "distance" : "1m",
                "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
                }
            }
        }
    }
  }
}

Any ideas why this might be?

Answer 1

You simply need to use the correct distance unit: m is for meters, and for miles you need to use mi

{
  "sort" : [
      {
          "_geo_distance" : {
              "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
              }, 
              "order" : "asc",
              "unit" : "mi"                     <--- here
          }
      }
  ],
  "query": {
    "filtered" : {
        "query" : {
            "match_all" : {}
        },
        "filter" : {
            "geo_distance" : {
                "distance" : "1mi",             <--- here
                "location" : {
                    "lon": -0.11454850000000001,
                    "lat": 51.4911665
                }
            }
        }
    }
  }
}