GeoShape Filter

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Filter documents indexed using the geo_shape type.

Requires the geo_shape Mapping.

You may also use the geo_shape Query.

The geo_shape Filter uses the same grid square representation as the geo_shape mapping to find documents that have a shape that intersects with the query shape. It will also use the same PrefixTree configuration as defined for the field mapping.

Filter Format

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The Filter supports two ways of defining the Filter shape, either by providing a whole shape defintion, or by referencing the name of a shape pre-indexed in another index. Both formats are defined below with examples.

Provided Shape Definition
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Similar to the geo_shape type, the geo_shape Filter uses GeoJSON to represent shapes.

Given a document that looks like this:

{
    "name": "Wind & Wetter, Berlin, Germany",
    "location": {
        "type": "Point",
        "coordinates": [13.400544, 52.530286]
    }
}

The following query will find the point using the Elasticsearch’s envelope GeoJSON extension:

{
    "query":{
        "filtered": {
            "query": {
                "match_all": {}
            },
            "filter": {
                "geo_shape": {
                    "location": {
                        "shape": {
                            "type": "envelope",
                            "coordinates" : [[13.0, 53.0], [14.0, 52.0]]
                        }
                    }
                }
            }
        }
    }
}
Pre-Indexed Shape
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The Filter also supports using a shape which has already been indexed in another index and/or index type. This is particularly useful for when you have a pre-defined list of shapes which are useful to your application and you want to reference this using a logical name (for example New Zealand) rather than having to provide their coordinates each time. In this situation it is only necessary to provide:

  • id - The ID of the document that containing the pre-indexed shape.
  • index - Name of the index where the pre-indexed shape is. Defaults to shapes.
  • type - Index type where the pre-indexed shape is.
  • path - The field specified as path containing the pre-indexed shape. Defaults to shape.

The following is an example of using the Filter with a pre-indexed shape:

{
    "filtered": {
        "query": {
            "match_all": {}
        },
        "filter": {
            "geo_shape": {
                "location": {
                    "indexed_shape": {
                        "id": "DEU",
                        "type": "countries",
                        "index": "shapes",
                        "path": "location"
                    }
                }
            }
        }
    }
}

Caching

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The result of the Filter is not cached by default. Setting _cache to true will mean the results of the Filter will be cached. Since shapes can contain 10s-100s of coordinates and any one differing means a new shape, it may make sense to only using caching when you are sure that the shapes will remain reasonably static.