ST_patchMax

ST_PatchMax computes the maximum values of all the attribute dimensions for all the pcpoint objects in a pcpatch object and returns a new pcpoint object whose attribute dimensions are set to these maximum values.

pcpoint ST_PatchMax(pcpatch pc);

SELECT ST_AsText(ST_PatchMax(pa)) FROM patches WHERE id = 7;

{"pcid":1,"pt":[-126.41,45.59,59,5]}