The following is a list of aggregate methods available for use with spatial data:

• ST_AsSVGAggr method for type ST_Geometry
• ST_ConvexHullAggr method for type ST_Geometry
• ST_EnvelopeAggr method for type ST_Geometry
• ST_GeomCollectionAggr method for type ST_GeomCollection
• ST_IntersectionAggr method for type ST_Geometry
• ST_LineStringAggr method for type ST_LineString
• ST_MultiCurveAggr method for type ST_MultiCurve
• ST_MultiLineStringAggr method for type ST_MultiLineString
• ST_MultiPointAggr method for type ST_MultiPoint
• ST_MultiPolygonAggr method for type ST_MultiPolygon
• ST_MultiSurfaceAggr method for type ST_MultiSurface
• ST_UnionAggr method for type ST_Geometry