ST_NRings
Signature
Parameters
ColumnOrName
required
Geometry column to calculate rings for
Returns
Column
Number of exterior rings + interior rings (if any) for the given Polygon or MultiPolygon
Accessors
ST_NRings (Python)
Returns the total number of rings in a Polygon or MultiPolygon.
Returns the total number of rings in a Polygon or MultiPolygon. Compared to ST_NumInteriorRings, ST_NRings takes exterior rings into account as well.
SQL reference: