Mapping a geo shape field

An extension to the concept of point is shape. ElasticSearch provides a type that facilitates the management of arbitrary polygons: the geo shape.

Getting ready

You need a working ElasticSearch cluster with Spatial4J (v0.3) and JTS (v1.12) in the classpath to use this type.

How to do it...

In order to map a geo_shape type, a user must explicitly provide some parameters:

• tree (by default, geohash): This is the name of the prefix tree implementation called geohash for GeohashPrefixTree and quadtree for QuadPrefixTree.

• precision: This is used instead of tree_levels to provide a more human value to be used in the tree level. The precision number can be followed by the unit, such as 10 m, 10 km, 10 miles, and so on.

• tree_levels: This is the maximum number of layers to be used in the prefix tree.

• distance_error_pct (the default is 0,025% and the maximum value is 0,5%): This sets the maximum number of errors allowed in PrefixTree.

The customer_location mapping, which we have...