On Wed, Dec 30, 2009 at 3:56 AM, David Carmean <d...@halibut.com> wrote:
> > 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? > You can't perform a polygon extract of a diff file (the diff file doesn't contain enough info to determine the location of ways whose nodes haven't changed). However you can perform a polygon extract on the merged result. In other words: 1. Apply the full diff to your extract first. 2. Run the result through the bounding polygon task again with the California coordinates. You can do it all in a single osmosis incantation if necessary. Something like: osmosis --read-xml-change diff.osc --read-xml california-orig.osm --apply-change --bounding-polygon file=polygonfile.txt --write-xml california-updated.osm > > Also curious: how much diskspace does the postGIS simple schema > use for a complete planet file? > I have no idea ... lots :-) Brett
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