On Tue, Jul 27, 2010 at 12:10 PM, Jerry Dunmire <[email protected]> wrote: > Early this morning Curt committed my patches to add tile support for > OSM to the CVS tree (thanks Curt).
Thanks Jerry! Personally I am on a very fast internet connection at home, so the static version performs just fine. Still I am looking forward to trying out the tiles. > Tiles are small (256x256) map sections that get assembled on-the-fly > to make an image that fills the xastir window. Since typical xastir > windows are larger than 256x256, there is a small penalty for the > extra http requests, but a big gain in re-use. Use of tiles is the key > to 'slippy map' implementations in browsers and some newer apps (take > a look at TangoGPS for an example). Tiles also improve the OSM > experience with xastir, just don't expect 'slippy map' performance. > Xastir's strengths like in other areas. > > There is an new README file describing OSM that gives a lot more > details on both the static and tiled maps. Please read it carefully. Nice! > The default setup provides new OSM*.geo map description files. There > are a mix of tiled and static maps. You can tell the difference by > file name. While any of the OSM based styles could be tiled, the tiles > from CloudMade require an access key. You have to register for at the > CloudMade site to get a key and then modify the appropriate GEO file. > > The biggest weakness in the present tiling implementation is that a > slow server, or worse one that does not respond, is a real problem > since for large screens you could have to wait 20 or more tiles to > time out before the display will refresh. The ski trail version of OSM > was giving me headaches with timeouts yesterday- take care. > > I am working on a way to cancel the tile downloads, but since most > sites are responsive I don't think you will run into too many problems > (unless you are a skier - hi hi ). I think I'll hold off on any new binaries or live CD remasters for now given there could be some additional tweaks in the near future. > Tiles are separated from the standard Xastir cache so that they can be > shared with other OSM applications. I have successfully shared tiles > between Xastir and TangoGPS. See the README.OSM_maps file for more > details. I'm very impressed. Thanks again. Lee - K5DAT Murphy, TX _______________________________________________ Xastir mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
