[[java-aggs-bucket-geohashgrid]]
==== Geo Hash Grid Aggregation

Here is how you can use
{ref}/search-aggregations-bucket-geohashgrid-aggregation.html[Geo Hash Grid Aggregation]
with Java API.


===== Prepare aggregation request

Here is an example on how to create the aggregation request:

[source,java]
--------------------------------------------------
AggregationBuilder aggregation =
        AggregationBuilders
                .geohashGrid("agg")
                .field("address.location")
                .precision(4);
--------------------------------------------------


===== Use aggregation response

Import Aggregation definition classes:

[source,java]
--------------------------------------------------
import org.elasticsearch.search.aggregations.bucket.geogrid.GeoHashGrid;
--------------------------------------------------

[source,java]
--------------------------------------------------
// sr is here your SearchResponse object
GeoHashGrid agg = sr.getAggregations().get("agg");

// For each entry
for (GeoHashGrid.Bucket entry : agg.getBuckets()) {
    String key = entry.getKey();                        // key as String
    GeoPoint keyAsGeoPoint = entry.getKeyAsGeoPoint();  // key as geo point
    long docCount = entry.getDocCount();                // Doc count

    logger.info("key [{}], point {}, doc_count [{}]", key, keyAsGeoPoint, docCount);
}
--------------------------------------------------

This will basically produce:

[source,text]
--------------------------------------------------
key [gbqu], point [47.197265625, -1.58203125], doc_count [1282]
key [gbvn], point [50.361328125, -4.04296875], doc_count [1248]
key [u1j0], point [50.712890625, 7.20703125], doc_count [1156]
key [u0j2], point [45.087890625, 7.55859375], doc_count [1138]
...
--------------------------------------------------