Risto H. Kurppa wrote: > On Thu, Apr 23, 2009 at 11:40 AM, Carlo Minucci <ge...@napodano.com> wrote: >> which funcionality do you want on yaouh? :) > > > These here sound good to me to have around (in Yaouh, too) > * skipping files modified recently
How recent would that be? I run yaouh to get the latest tiles where I have updated the map. Of course, this is often the same tiles as I refreshed a couple of days earlier. So I think this has to be optional. Some kind of uses need to check fairly new tiles. > * forcing download empty tiles What does that mean? > > Does someone actally know how much load it creates on (new :) OSM > servers to update X mb of tiles with y% to be updated? Are there still > ways to decrease this? A tile tends to be 10-30kB. Perhaps 20kB on average? A header check is about 100 byte. So X MB of tiles is about 1000X/20=50X tiles. All 50X tiles get checked, so 50X*100 byte is about 5X kB. Of these 50X tiles, y% gets updated, and is on average 20kB. so, 50X*y/100*20kB = 10Xy kB. So with these numbers, you get 5X+10Xy kB or (5+10y)X kB to transfer. Helge Hafting _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
