Using the geo_distance query

When you are working with geolocations, one common task is to filter results based on the distance from a location. This scenario covers very common site requirements such as:

• Finding the nearest restaurant within a distance of 20 km

• Finding my nearest friends within a range of 10 km

The geo_distance query is used to achieve this goal.

Getting ready

You need an up-and-running Elasticsearch installation as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

To execute curl via the command line, you need to install curl for your operating system.

To correctly execute the following commands, you need an index populated with the chapter_07/populate_geo.sh geoscript available in the online code.

How to do it...

To execute a geo_distance query, we will perform the following steps:

1. Searching documents in which pin.location is 200km away from lat  40 and lon as  70 is done with a similar query:

           curl -XGET 'http://127...