On Nov 30, 2007 9:51 PM, pdecker <[EMAIL PROTECTED]> wrote: > I want OpenLayers to provide tiles for a bounding box which spans the 180th > meridian, for examle: upper left latitude=1.0, upper left longitude=170.0, > lower right latitude=-1.0, lower right longitude=-170.0.
OpenLayers doesn't provide tiles, it requests them, soI'll assume that's what you mean. > Given this bbox, OpenLayers will then request the following tiles: > minLon=0.0 maxLon=180.0 minLat= -90.0 maxLat=90.0 > minLon=-180.0 maxLon=0.0 minLat= -90.0 maxLat=90.0 > minLon=-180.0 maxLon=180.0 minLat= -90.0 maxLat=270.0 > minLon=-180.0 maxLon=332.0 minLat= -90.0 maxLat=422.0 > > The maxLat=270, maxLon=332, maxLat=422 are out of range for valid > latitude/longitude values. They're out of the normal range for lat/lon, but other than that there's no problem. If you look at how informationfreeway works, it notes when you've gone over the meridian and starts requesting tiles on the other side. There's actually code built into OpenLayer to handle this case. No single tile wraps over the meridian, but the effect looks like it does. Does this help? Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
