Speaking of not enough zoom levels, locations in the more northern and more southern latitudes actually have an "extra" zoom level. Because of the Mercartor projection, locations near 60 degree latitude (north or south) have twice the linear scale as locations on the equator for the same zoom level. So if you guys think that zoom level 18 is not enough, consider that it's definitely not enough for equatorial places (like Singapore).
On Mon, May 17, 2010 at 8:37 PM, Maarten Deen <md...@xs4all.nl> wrote: > On Mon, 17 May 2010 14:32:34 +0200, Fabio Alessandro Locati > <fabioloc...@gmail.com> wrote: > >> Adding a zoomlevel adds 4 tiles for each tile in the previous > zoomlevel. > >> You'll go from 91 billion tiles to 366 billion. > >> This meaning you need 4 times the load to generate, 4 times the storage > >> to > >> hold them, 4 times the traffic to display them. > > Mathematically speaking is true, but maybe is not true in real world. > > I have seen a lot of times people not using the last level of zoom > > (how many times you have to see a whole road or even more then one > > road? ) therefore the traffic will not be 4 times more. Also, even > > considering '4 times more' as true, we have to consider that is only 4 > > times more the traffic generated by the zoom level 18, not the whole > > OSM traffic. > > True. It will probably generate more traffic (it will in cases where > people zoom in to an area) but 4 times is probably overstating it (I was > extrapolation on the "4 times" bit too eagerly). > > Regards, > Maarten > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- http://vaes9.codedgraphic.com
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