[postgis-users] Expanding a geometry

[Nicolas Ribot]

Hi list,

Is there an easy way to produce an expanded polygon (not only its bbox) ?
By expanded polygon, I mean a resulting polygon which geometry is the
same as the input one, but just "scaled" (no rounded corners like the
result of buffer()). (edges remain parallel, and distance between
initial polygon edges and resulting polygon is constant)

Are scale() or affine() able to produce a valid result, even with
complex polygons (holes, multipolygon ?)

Thank you
Nicolas