geo_point_to_geohash()

Calculates the geohash string value of a geographic location.

Read more about geohash.

Syntax

geo_point_to_geohash(longitude, latitude,[ accuracy ])

Parameters

Returns

The geohash string value of a given geographic location with requested accuracy length. If the coordinate or accuracy is invalid, the query produces an empty result.

Geohash rectangular area coverage per accuracy value:

See also geo_point_to_s2cell(), geo_point_to_h3cell().

Examples

The following example finds US storm events aggregated by geohash.

StormEvents
| project BeginLon, BeginLat
| summarize by hash=geo_point_to_geohash(BeginLon, BeginLat, 3)
| project geo_geohash_to_central_point(hash)
| render scatterchart with (kind=map)

Output

The following example calculates and returns the geohash string value.

print geohash = geo_point_to_geohash(-80.195829, 25.802215, 8)

Output

The following example finds groups of coordinates. Every pair of coordinates in the group resides in a rectangular area of 4.88 km by 4.88 km.

datatable(location_id:string, longitude:real, latitude:real)
[
  "A", double(-122.303404), 47.570482,
  "B", double(-122.304745), 47.567052,
  "C", double(-122.278156), 47.566936,
]
| summarize count = count(),                                          // items per group count
            locations = make_list(location_id)                        // items in the group
            by geohash = geo_point_to_geohash(longitude, latitude)    // geohash of the group

Output

The following example produces an empty result because of the invalid coordinate input.

print geohash = geo_point_to_geohash(200,1,8)

Output

The following example produces an empty result because of the invalid accuracy input.

print geohash = geo_point_to_geohash(1,1,int(null))

Output