On Thu, Nov 22, 2007 at 08:36:40PM +0000, Ian Mayo wrote: > Hi all, > I'm trying to put together an OpenLayers distribution that will run > from without an internet connection. I'm really pleased with the > soon-to-be-released cached worldwind layer, but am interested in > vectored data such as coastlines and country outlines. I've looked & > looked, but can't find anything in the OpenLayers functionality > specifically gives me what I'm looking for, but there are the Vectored > layers. > > So, can anybody point me to datasets representing world coastlines or > country outlines that are recorded in one of OpenLayers vector file > dataset?
There is no way that OpenLayers can render even a very low resolution data set of country outlines for the whole world. Figure, as a guess, about 100 features, max, and that's if they're relatively simple. Complex vectors -- even simplified complex vectors -- are going to cause browsers to hang, rather than render the data. Totally offline data can be easy... if it is small or your storage is big. Storing the top 7 levels of the vmap0 dataset as tiles is something like 200MB of data. Depending what you actually want to do, this might be useful or not -- but I'm almost positive that it's going to be more useful than trying to actually draw the world as a vector. Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
