Executing geo distance facets

Other than standard types that we have seen in the previous facets, ElasticSearch allows executing facets against a GeoPoint: the geo distance facets. This is an evolution of the previously discussed range facets built to work on geo locations.

Getting ready

You need a working ElasticSearch cluster and an index populated with the script available in online code.

How to do it...

For executing geo distance facets, we will perform the steps given as follows:

1. Using the position field available in documents, we want to aggregate the other documents in four ranges:

   • Less then 10 kilometers

   • From 10 kilometers to 20

   • From 20 kilometers to 50

   • From 50 kilometers to 100

   • Above 100 kilometers

2. To achieve these goals, we create a geo distance facet with a code similar to this one:

   curl -XGET 'http://127.0.0.1:9200/test-index/test-type/_search?pretty=true&size=0' -d ' {
       "query" : {
           "match_all" : {}
       },
       "facets" : {
           "position" : {
               "geo_distance"...