On Sat, May 4, 2013 at 3:31 AM, Michal Migurski <m...@teczno.com> wrote:
> On May 3, 2013, at 12:22 PM, Eugene Alvin Villar wrote: > > > On Sat, May 4, 2013 at 2:27 AM, Michal Migurski <m...@teczno.com> wrote: > >> Would it be silly to suggest that changesets get their own geometries > in PostGIS and an associated spatial index, consisting of every way and > node deleted, moved, etc.? > > > > Isn't this similar to what Paweł's New History Tab is doing behind the > scenes? > > Maybe—where would I look to find out? > > https://github.com/ppawel/openstreetmap-website is obviously the starting > point, but where then? > The source code is definitely the place where one should look. I think this is the more direct location: https://github.com/ppawel/openstreetmap-website/tree/owl-history-tab Anyway, basing on Paweł's numerous previous emails on the subject since January, I gather that his code processes each changeset and creates vector tiles which record the geometry changes. Vector tiles are obviously spatially indexable.
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