ST_Box2dFromGeoHash
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## Name

ST_Box2dFromGeoHash — Return a BOX2D from a GeoHash string.

## Synopsis

`box2d ST_Box2dFromGeoHash(`text geohash, integer precision=full_precision_of_geohash`)`;

## Description

Return a BOX2D from a GeoHash string.

If no `precision` is specified ST_Box2dFromGeoHash returns a BOX2D based on full precision of the input GeoHash string.

If `precision` is specified ST_Box2dFromGeoHash will use that many characters from the GeoHash to create the BOX2D. Lower precision values results in larger BOX2Ds and larger values increase the precision.

Availability: 2.1.0

## Examples

    SELECT ST_Box2dFromGeoHash('9qqj7nmxncgyy4d0dbxqz0');

                    st_geomfromgeohash
    --------------------------------------------------
     BOX(-115.172816 36.114646,-115.172816 36.114646)

    SELECT ST_Box2dFromGeoHash('9qqj7nmxncgyy4d0dbxqz0', 0);

     st_box2dfromgeohash
    ----------------------
     BOX(-180 -90,180 90)

     SELECT ST_Box2dFromGeoHash('9qqj7nmxncgyy4d0dbxqz0', 10);
                                st_box2dfromgeohash
    ---------------------------------------------------------------------------
     BOX(-115.17282128334 36.1146408319473,-115.172810554504 36.1146461963654)

## See Also

ST_GeoHash, ST_GeomFromGeoHash, ST_PointFromGeoHash

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