[Tilesathome] [OSM-dev] Generate complete slippy map (mapnik/generate_tiles.py)

[Christopher Schmidt]

On Tue, Apr 15, 2008 at 02:10:55PM -0600, Jason Reid wrote:
> Robert (Jamie) Munro wrote:
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> > Andy Allan wrote:
> > | On Fri, Apr 11, 2008 at 2:04 PM, Sebastian Mauer
> > <sebastian at n-unity.de> wrote:
> > |> Hello there
> > |>
> > |>  I'm currently trying to use mapnik/generate_tiles.py to generate a
> > slippy
> > |>  map of the whole world.
> > |>  However it seems, with default settings in place I'm only getting a
> > detailed
> > |>  slippy map of Great Britain.
> > |>  What (bounding box?) settings should I use to generate a complete
> > world 0-16
> > |>  map?
> > |
> > | Hang on - I doubt you've got enough disk space to do that. That's
> > | terabytes of space you'd need.
> >
> > How does Tiles at Home plan to do it? :-)
> >
> > Robert (Jamie) Munro
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> >   
> Simply no one does plan to render it all with T at H. You can knock roughly 
> 70% of the tiles off just by eliminating the oceans and with the current 
> system for blank tiles a significant amount of empty land can be 
> consolidated upwards. Even if we managed to add every road on the planet 
> in, I'd estimate that in excess of 90% of the world would be blank tiles.

Also, we have terabytes of disk space: currently, there are 36TB of
disks mounted on the t at h server.

> The best option is to use mod_tile to generate the tiles on the fly, it 
> takes a bit more work to get going but its worth it in the end.

I'm curious why people feel that mod_tile is better than TileCache for
this.

Regards,
-- 
Christopher Schmidt
MetaCarta