[osmosis-dev] planet diff to polygon extract?

[David Carmean]

For the moment I'm working with just the Cloudmade California extract 
(in PostGIS simple schema).  Is it possible to perform a polygon 
clip/extract of the daily planet diffs (changefile)?  Failing that, 
what happens if a planet-wide diff is applied to an incomplete 
planet base file?

Also curious: how much diskspace does the postGIS simple schema 
use for a complete planet file?

Thanks.