id summary reporter owner description type status priority milestone component version severity resolution keywords cc 560 Centroid of EMPTY is a COLLECTION rather than POINT strk geos-devel@… Not very important, but as ST_Buffer is guaranteed to return an areal geometry (POLYGON EMPTY in the empty case) I guess Centroid should also return a typed POINT no matter emptyness (for consistency) defect closed major 3.3.5 Default 3.3.4 Unassigned fixed