[postgis-users] Bug fix for transform() function

[Dave Blasby]

Paul Ramsey wrote:
> 
> Would a type-cast which forces box3d into a polygonal envelope clean up
> such problems? BTW, after transformation, is a box3d still rectangular?

A BBOX just has the Bottom LL corner and Top UR corner in it. 
Transform() now just
transforms these 2 points, so the result is *always* rectangular.

'envelope( <bbox-only geometry> )' will return a polygon.

dave