[pkg-fso-maint] tangogps and openstreetmap

Mitja Kleider mitja at mitjakleider.de
Sun Mar 1 21:36:15 UTC 2009


Hi,

Am Sonntag, den 01.03.2009, 22:20 +0100 schrieb Steffen Moeller:
> >> The directory /root/Maps seems to find some consensus between Qtopia and Debian concerning
> >> the location of OpenStreetMap data that was downloaded for offline reuse. I'd prefer to
> >> use /var/cache/osm, instead. Would that sound reasonable to you as well? Or is there a
> >> better location?
> > 
> > Downloaded maps are user data, thus should be below ~ (i.e. /root while
> > running as root, /home/someone while running as a normal user).
> > 
> > That said, it should probably be in ~/.tangoGPS, to follow unix
> > convention.
> 
> I don't think so. This is public and mostly invariant data. With multiple individuals one
> could possibly learn about someone's preference in locations, but otherwise this should be
> shared - between users and applications.

OSM data is not invariant at all. Mapnik and Cycle Map tiles are updated
once a week, Osmarender is rerendered daily or more often.
The bare data behind the rendered tiles is updated 24/7.

Most common users will not update often, most mappers would like to have
the most recent tiles.

For multi-user environments it would make sense to share the cache, but
I do not want to update tiles as root.

Greetings,
Mitja




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