Spoiler: show
This is a map released by Empire showing TFA locations superimposed upon the existing EU map that predates the films.
Of particular note is Starkiller base effectively being the same galactic location as Ilum. It may even be Ilum. This explains a lot, as the planet is effectively the only source of lightsaber crystals that the Jedi used. If the First Order has converted the planet into a superweapon it might explain why there's no new Jedi order and the only lightsaber that isn't Kylo's is Anakin's/Luke's old one, they simply can't make them.
Here's a screengrabbed version of the original map printed in the magazine. Interesting that Rakata Prime is listed on there.
In other news, Mark Hamill was caught tweeting that he'll appear in Episode VIII, mentioning he needed to grow back his beard in time for filming it. Still doesn't mean he's not a Force ghost, but it's still interesting.
Another interesting Luke point is that the First order have been teaching their stormtroopers that Luke was the villain of the OT. Which isn't exactly ground breaking, but would explain why he might be in hiding if he is.