On Wed, Sep 16, 2009 at 8:10 AM, Ian Dees <ian.d...@gmail.com> wrote:
> On Wed, Sep 16, 2009 at 7:38 AM, Peter Körner <osm-li...@mazdermind.de>wrote: > >> Okay, so how can we go on now.. I'm not a ruby man and I don't have a >> possibility to test all this. >> >> Atm. my fallback-plan is to wait until the Wikimedia-Guys finished setup >> of their copy of the osm-db (which will contain the history tables!) so >> I can fetch my data directly from the db. >> > > It would seem to me that the first step would be to build up a history > table that allowed us to know which rev node was used by a way at some > revision of a way. This could be done using the timestamps on the nodes and > ways as discussed elsewhere, but more importantly, it only needs to be done > once. Once we have this info, the way history call could include a node > version number along with a ref: > > <way id=...> > <nd ref="..." rev="1" /> > <nd ref="..." rev="3" /> > <nd ref="..." rev="1" /> > </way> > > ... etc. > > >> >> I'm sure some months will pass by until this will happen and it would be >> sad I had to stop working until than :) >> >> Another thing that came into my mind was that we also should have an >> versioned GET /api/0.6/[way|relation]/#id/full call (I think this is >> what Ian requested, is it?) >> > > With the above per-node rev attribute, it would be trivial* to populate a > full-history call. > > >> >> Any one volunteering to work on this? >> >> > I think it would be interesting... if someone helped me populate the > initial table based on timestamp in a way that wouldn't take years of CPU > time. > Oops: * trivial for some definitions of trivial. "ref" above should have been "rev".
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