On Thu, Jul 10, 2008 at 11:32:24PM -0700, Alan Millar wrote: > > captionless is only z12 > > We discussed this recently and came to the conclusion that the captionless > layer should exist for more levels than just z12, so that we could do > things like support labels in other languages. See:
Captionless needs only be rendered for z12, it can be stitched together at lower zoom levels, just like the regular lowzooms. > > But then I plan to not store empty z12 tilesets at > > all, but have a "blank tileset db" for that (which only has entries for > > completely empty tilesets). But given that we currently waste tons of > > diskspace for the millions and millions of files and thousands of > > directories (which all use up an unknown minimum filesize), I would think > > that we waste still much less space than we currently do. > > The blank tile database will be the biggest savings in space of anything > we can do, particulary if it is fully recursive. It's always a tradeoff of lookups vs the number of entries. Yes, going recursively up to -say- zoom level 6 or so might be feasible. However, given that disk space is not our bottleneck, this is pretty low on my current list. > If we can't do full recursion, then hopefully we can at least do z6 to > eliminate 4096 blank z12s. In addition to the ocean, there is quite a bit > of Yukon, Greenland, and Siberia that can be stored in blank z6 entries. Yep, it does make sense in general, however as I said above, there's more urgent things on my list right now. spaetz _______________________________________________ Tilesathome mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/tilesathome
