ibis.expr.api.GeoSpatialColumn.unary_union¶
-
GeoSpatialColumn.
unary_union
()¶ Aggregate a set of geometries into a union.
This corresponds to the aggregate version of the PostGIS ST_Union. We give it a different name (following the corresponding method in GeoPandas) to avoid name conflicts with the non-aggregate version.
- Parameters
arg (geometry column) –
- Returns
union
- Return type
geometry scalar