The Star Charts map actually tries to be faithful even to that funny perspective view that Andrew Probert created for TNG. You could overlay that, too, on the Charts, and have everything match - except for the real stars, which Probert put in the wrong places.
The image above is not of the original Probert map, to be sure, but of one doctored with additional names like Bajor and Cardassia. It's probably still "official", though, in the sense that the doctoring we see was quite probably done by Okuda for use in the early seasons of DS9 (we see it in Keiko's schoolroom once or twice). Or then it could be a fan interpretation...
The idea of the Jem'Hadar using Romulan space "indirectly", through a long "Hail Mary" hooking maneuver, is derived directly from the DS9 war room wall charts that have the position of Cardassia nailed down, and show the Romulan symbol to the far right, at the end of the hook. The idea that Earth sits in the center of the hook is speculation, based on distance estimates and the otherwise well-established idea that Earth should be between Romulan/Klingon space and Cardassian homelands.
I think the most relevant chart here is the one that wasn't considered when drawing up Star Charts, though: the one we see in TNG "Birthright". There, the Carraya prison camp is shown in Romulan space on a map that also features DS9's location. Unfortunately, this chart isn't among the TrekCore screencaps. Anybody willing to do a capture?
Timo Saloniemi
I'd always thought that was pretty much how the line worked - the Fed is cut in half and the Dominion crosses around behind the Feds to flank the Federation.
