User blog comment:Gundam Legilis/NYCC Tomorrow/@comment-3257939-20151008042754/@comment-3257939-20151008221206

The map says so too. If you look at the colored version, you can see that the desert is in the middle of it but it's just a part of Vacuo. Maybe the main city of Vacuo is located in the desert but the rest of its boundaries go all the way to the places where there is flora.