[OSM-dev] Augmented Diffs

[Christian Quest]

BRAVO !

I started a talk on the same idea on the french osm-dev-fr list.

About relations, the need to reconstruct their geometry is depending
on their final use where ways geometry are mostly needed and I feel
they are more resource hungry.

A few questions...

When the change on a node or way is just a tag change and does not
involve geometry change, are the diff still providing all linked
nodes/ways ?
It would be great to have a clue in the diff that it is just a tag
edit and not a geometry edit, this would save the geometry
reconstruction processing...


Next step is to update osm2pgsql and similar tools ;)


2012/8/27 Roland Olbricht <roland.olbricht at gmx.de>:
> Dear all,
>
>
>
> Overpass API now offers Augmented Minute Diffs. The idea goes back to a talk
> of Matt Amos at SOTM 2010. These diffs allow e.g. to keep a geographically
> limited database extract up to date.
>
>
>
> The details are documented in the wiki
>
> http://wiki.openstreetmap.org/wiki/Overpass_API/Augmented_Diffs
>
>
>
> However, these diffs address developer, not end users, because there is no
> software yet that can process these diffs. Therefore, I would be happy for
> comments and suggestions on this matter that arise when writing such a
> software. If there are good reasons to change the format, I'll try to do it
> only once, at the same time like the database reimport after the license
> change.
>
>
>
> Happy updating,
>
>
>
> Roland
>

-- 
Christian Quest - OpenStreetMap France - http://openstreetmap.fr/u/cquest