[OSM-dev] How to get offline maps of a large area in reasonable time?

[sly (sylvain letuffe)]

> I started trying  the first options but it is way to slow. Probably  
> because some never requested tiles also have to be rendered on the  
> server first?
Exact. I don't think it's a good idea anyway without asking the server admin. 
That will put a constant load on the server and prevent other users to have a 
responsive answer to their browsing.

> I already have the planet file  
> loadet into a PostGIS-DB
> Does anybody know how many GB the whole world is? Or Germany?

Doesn't your Operating System support "display disk usage" of a directory ?

Maybe I don't understand your question...

I'm working on the europe extract and I count around 3 times the uncompressed 
osm file or 30 times the compressed one (using osm2pgsql in slim mode)
but dispending of your method it may vary very much.

Or you mean tiles on disk usage ?
 
> How long would it take to render on a quite powerfull desktop-machine?
3 seconds for zoom 0
3 times the age of the universe at zoom 30

That all dispend on the max zoom you want.

As a rapid guess on germany at max-zoom 16 I bet it would take around 2 days

> Or are there any other ideas on how to get such a big amount of data?

See why almost no-one renders in advance every thing up to zoom 18 by 
reading :
http://wiki.openstreetmap.org/wiki/Mod_tile
http://wiki.openstreetmap.org/wiki/Slippy_Map

-- 
sly 
Sylvain Letuffe liste at letuffe.org
qui suis-je : http://slyserv.dyndns.org