A collection of posts by David Weber containing background information for his stories, collected and generously made available Joe Buckley.
One important point (besides the fact that there are a couple of minor spelling errors, mainly because of where I've been re-editing between books) -- This map is not complete. The areas where I've supplied detail are pretty much set in stone, although I reserve the right to make changes on anything which hasn't actually appeared in print (IN CASE of EMERGENCY: Break Tectonic Plate!), but I haven't fleshed out the entire world in story-telling detail at this time. I think what we're doing in BSRA is using an updated "world map" in the endpapers, very like the one in OAR, but then using full-page detail maps of Emerald, Chisholm, Corisande, etc, as section/chapter breaks. If you can zoom in tightly enough in some places, you'll actually see shoals and clear channels for some of the major ports indicated on the map, and more such detail will be added as time goes along.