Compute Geo Distance in Elasticsearch

How to get the distance between two geo points in the elasticsearch?

Use a script field with the same reference point as in the geo_distance filter. Full query:

{
  "query": {
    "bool": {
      "must": {
        "match_all": {}
      },
      "filter": {
        "geo_distance": {
          "distance": "5000km",
          "pin.location": [
            -70,
            40
          ]
        }
      }
    }
  },
  "script_fields": {
    "distance_in_m": {
      "script": "doc['pin.location'].arcDistance(40, -70)"
    }
  }
}

OR

geo-sort and you'll get the distance info included in the sort response.

Return distance in elasticsearch results?

Yes you can, by using a script field.

For instance, assuming your doc have a geo-point field called location, you could use the following:

(note the \u0027 is just an escaped single quote, so \u0027location\u0027 is really 'location')

curl -XGET 'http://127.0.0.1:9200/geonames/_search?pretty=1'  -d '
{
   "script_fields" : {
      "distance" : {
         "params" : {
            "lat" : 2.27,
            "lon" : 50.3
         },
         "script" : "doc[\u0027location\u0027].distanceInKm(lat,lon)"
      }
   }
}
'

# [Thu Feb 16 11:20:29 2012] Response:
# {
#    "hits" : {
#       "hits" : [
#          {
#             "_score" : 1,
#             "fields" : {
#                "distance" : 466.844095463887
#             },
#             "_index" : "geonames_1318324623",
#             "_id" : "6436641_en",
#             "_type" : "place"
#          },
... etc

If you want the _source field to be returned as well, then you can specify that as follows:

curl -XGET 'http://127.0.0.1:9200/geonames/_search?pretty=1'  -d '
{
   "fields" : [ "_source" ],
   "script_fields" : {
      "distance" : {
         "params" : {
            "lat" : 2.27,
            "lon" : 50.3
         },
         "script" : "doc[\u0027location\u0027].distanceInKm(lat,lon)"
      }
   }
}
'

compute geo distance in elasticsearch

Sorting by _geo_distance will return the distance in the results:
http://www.elasticsearch.org/guide/reference/api/search/sort.html

How to get distance from elasticsearch.net / NEST for a geo_point field

You need to use script field to return distance

"script_fields":{
     "distance":{
            "script":"doc['latlng'].arcDistance(params.lat,params.lng)",
            "params":{
                    "lat":<some value>,
                    "lng":<some value>
             }
      }
}

Nest

 var scriptFields = new ScriptFields
            {
               {
                   "distance", new ScriptField {
                       Script = new InlineScript( "if(doc['"+field+"'].size() > 0) { doc['"+field+"'].arcDistance(params.lat,params.lon) }")
                       {
                           Params=new FluentDictionary<string, object>
                           {
                              { "lat", latitude},
                              { "lon", longitude}
                           }
                       }
                   }
                }
            };

How to calculate geographic distance in a Painless script (OpenSearch 1.0)

It looks like distanceInKm and distanceInMiles were both replaced some time ago by arcDistance(double lat, double lon) and planeDistance(double lat, double lon) - and all distances are now returned in meters.

See here for an explanation of how these two are different.

Return distance in geo distance query in elastic search 5.x

The method distanceInKm was deprecated and is removed now (5.x). Use for example arcDistance instead. More information here: https://www.elastic.co/guide/en/elasticsearch/reference/current/breaking_50_scripting.html#_geopoint_scripts

The syntax is a little bit changed. This works for me in Elasticsearch 5.6.

{
    "script_fields": {
        "geo_distance": {
            "script": {
                "params": {
                    "lat": 18.00,
                    "lon": 72.00
                },
                "inline": "doc['location'].arcDistance(params.lat, params.lon)"
            }
        }
    }
}

Units of an elasticsearch query to get distance from arbitrary point to Geopoint

The units are those returned by the arcDistance method providing the value in your script.

The arc distance (in meters) of this geo point field from the provided lat/lon

The painless docs leave a lot to be desired (there appears to be no docs on this method in 6.5). The quote above was obtained from here: https://www.elastic.co/guide/en/elasticsearch/reference/2.3/modules-scripting.html

Additionally, they mention arcDistance caluclates meters here: https://www.elastic.co/guide/en/elasticsearch/reference/5.5/breaking_50_scripting.html

elastic search query for geo points distance

finally i used script:

GET development-restaurants/restaurants/_search
{
    "query": {
        "bool" : {
        "must" : {
            "script" : {
                "script" : {
                    "source": "doc['restaurantPoint'].arcDistance(35.73702, 51.40909) <= doc['deliveryRadius'].value",
                    "lang": "painless"
                 }
            }
        }
     }
  }
}

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