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List:       postgis-users
Subject:    Re: [postgis-users] Bug fix for transform() function
From:       "Chris Hodgson" <chodgson () refractions ! net>
Date:       2002-09-04 17:41:43
Message-ID: 002501c2543a$558dfc00$2732a8c0 () orca
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> 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.

Right, but the transformation of the polygonal envelope of the original
box3d, is not necessarily going to be rectangular - so, by translating the
two corners of the box, to create a new box, you are losing some
information... all the more reason to force boxes into polygons before doing
things with them, as Paul has suggested.

Chris



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