[OSM-dev] tiles tiles tiles

SteveC steve at asklater.com
Wed Dec 6 14:38:17 GMT 2006


* @ 02/12/06 02:01:14 AM jburgess at uklinux.net wrote:
> On Wed, 2006-11-29 at 21:23 +0000, SteveC wrote:
> > Using a bugfixed version of almiens tilecount.pl (which figures out what
> > tiles actually have map data on them), I've written a script to render
> > them (from zoom 0-18).
> > 
> > There are 1828075 such tiles to do, and at 25k per tile (most are less
> > than this it seems) equates to 40 odd Gb of data. We currently have
> > 973994 tiles live, or about half that number. So it's an easily
> > acheivable target.
> > 
> 
> I'm afraid there was a bug in tilecount.pl which broke the calculation
> of tiles for zoom level 17 & 18. I've put the fix in SVN and this now
> calculates 7606697 tiles need to be rendered.
> 
> I've also rewritten the tilecount script into C which is faster and uses
> less memory than the Perl version. This is in all_tiles/C.

cool thanks
 
> It looks like the projection system has an intended latitude limit of
> +-85.0511 degrees. Should we be discarding any points outside this?

I think so

have fun,

SteveC steve at asklater.com http://www.asklater.com/steve/




More information about the dev mailing list