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geohash_precision
editgeohash_precision
editGeohashes are a form of lat/lon encoding which divides the earth up into a grid. Each cell in this grid is represented by a geohash string. Each cell in turn can be further subdivided into smaller cells which are represented by a longer string. So the longer the geohash, the smaller (and thus more accurate) the cell is.
The geohash_precision
setting controls the length of the geohash that is
indexed when the geohash
option is enabled, and the maximum
geohash length when the geohash_prefix
option is enabled.
It accepts:
- a number between 1 and 12 (default), which represents the length of the geohash.
-
a distance, e.g.
1km
.
If a distance is specified, it will be translated to the smallest geohash-length that will provide the requested resolution.
For example:
PUT my_index { "mappings": { "my_type": { "properties": { "location": { "type": "geo_point", "geohash_prefix": true, "geohash_precision": 6 } } } } } PUT my_index/my_type/1 { "location": { "lat": 41.12, "lon": -71.34 } } GET my_index/_search?fielddata_fields=location.geohash { "query": { "term": { "location.geohash": "drm3bt" } } }