Hi,
On 01/21/13 07:54, Brian Cavagnolo wrote:
I'm kinda hooked on the appeal of only working with the changeset. I
poked around the osmosis source and learned a bit about the change
format. It looks like changes could be filtered using the same code
used for the polygon and bounding box filters. Does this sound
intuitively correct?
No.
The fact that changesets cannot be filtered by region is not a software
limitation, it is a design limitation.
Changes can occur in nodes, ways, or relations; but only nodes have a
geometry given in the .osc file. For example, an .osc file might contain
the information "way #17 has been changed from highway=residential to
highway=unclassified" but you won't know if that is relevant to you
because the nodes of that way are not included in the changeset (unless
by chance they have been modified at the same time).
If you really want to pursue this further, read up on "augmented diffs"
which are reference-complete and would therefore allow such filtering:
http://wiki.openstreetmap.org/wiki/Overpass_API/Augmented_Diffs
Bye
Frederik
--
Frederik Ramm ## eMail [email protected] ## N49°00'09" E008°23'33"
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