And I doubt the author created that map. So, who did create the map? What's it's source?
I would agree that the information appearing on starwars.com gives it some authority and agree that Ilum is not Star Killer base. I'd say the starwars.com article is the best and authoritative source of information currently available and was what convinced me that Ilum is not Star Killer base.
But I wouldn't say it's canon. Even the TFA novelization isn't "canon" according to Pablo Hidalgo (meaning other authors and film makers could contradict something it introduced that wasn't in the movie).
The identity of the graphic artist who created the map isn't relevant. The text stated "near but not Ilum."
I'm going to take the official website at it's word. But starwars.com could change its mind depending on what a future film says and I'd not care a lick.
Who the graphic artist is is irrelevant - my point was that the map creation process was also vetted to some degree and someone told the graphic artist what to do and I wonder who that came from and what their process is for putting out new information. I pretty much agree with you - I'm also taking the official website at it's word, my point was just that something appearing in an article does not mean it cannot be altered by an author, film maker etc.