Executing a geo distance aggregation
Among the other standard types that we have seen in the previous aggregations, Elasticsearch allows you to execute aggregations against a GeoPoint: the geo distance aggregations. This is an evolution of the previously discussed range aggregations that have been built to work on geo locations.
Getting ready
You need an up and running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1, Getting Started.
To execute the commands, any HTTP client can be used, such as cURL (https://curl.haxx.se/), Postman (https://www.getpostman.com/), or similar. Using Kibana Console is recommended, as it provides code completion and better character escaping for Elasticsearch.
To correctly execute the following commands, you will need an index populated with the ch07/populate_aggregation.sh commands available in the online code.
The index used in this recipe is index-agg.
