[OSM-dev] Augmented Diffs

Christian Quest cquest at openstreetmap.fr
Thu Aug 30 20:59:49 BST 2012


2012/8/30 Roland Olbricht <roland.olbricht at gmx.de>:
> Dear all,
>
>
>> One complete different thing that would also been very interesting to
>> have in even more augmented diffs is the previous version of an
>> object.
>> This would allow to do analysis on edits without the need of a
>> database... and also apply diff backwards.
>>
>
>> Of course, the side effect will be larger files, but is that a real
>> problem
>> ?
>
> This is not a real problem. In fact, the diffs already contain the previous
> version of all changed objects.

Sorry, I didn't saw.


>> Last question (for the moment)... have you looked at .o5c file format
>> to produce near pbf compact diffs
>
> Not really. I spent a weekend in January to understand PBF and how to
> generate it but I didn't understand the documentation and put it aside.
>

o5m abd o5c files are not pbf files, but some kind of binary osm/osc files.

They are as compact as pbf, but much easier to create and use.

-> http://wiki.openstreetmap.org/wiki/O5m

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



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