Signatures
Parameters
The input geometry.
The number of decimal places.
Return type
The numeric XZ2 index value.
Spatial Indexing
ST_XZ2
Returns the numeric index (a long integer) representing the XZ2 value.
Only supports data in lon/lat format. XZ2 is a 2D space filling curve that is used to index 2D data. Compared
to a GeoHash, it provides improved sorting for non-point data that takes into account the bounding box of
the geometry.