id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 2828,[raster] speed up ST_Envelope,strk,Bborie Park,"I noticed that ST_Envelope(rast) is implemented as ST_Envelope(ST_ConvexHull(rast)). I'm not sure if that's necessary. Ideally ST_Envelope should be able to give a response by only looking at the raster header, without even fully detoasting the raster. See #2822",enhancement,closed,medium,PostGIS 2.2.0,raster,master,fixed,history,