2011/1/16 Jon Burgess <[email protected]>: > It is relatively easy to extend the current scheme to support more zoom > levels but we need to avoid breaking the existing setups which have > millions of tiles cached with the current directory layout. One simple > fix would be to extend to a 6 byte layout for zoom 21-24, 7 bytes for > zoom 25-28 etc.
Probably there will be few practical value of extending the scheme for zoom levels higher then 24: in zoom 24 one pixel corresponds to roughly 9 mm (tilelength around 2.4 m), hence reaching the accuracy limit of the OSM database coordinate scheme. cheers, Martin _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
