I always imagined that one level of a hive is more or less an open area with a domed ceiling and some kind of houses sprawled about. Thank you very much for the explanation and the interesting links. Dark Heresy First edition used to feature a lot more black and white maps. I think that they don't quite get how GM's use their products or they play test with only very narrative GM's.
What really annoys me is that I often have to take the map from the book, and then rotate it because they enjoy putting it at some bizarre angle, then fill all the corners that they've cut off to make the map look weathered. My more recent stuff can be found couldn't tell you how fantasy flight selects the maps they are going to put in their books. I really went all out on three stakes rest. This was stuff I did when I was just getting going I also made the upstairs office with the gun servitor and the escape tunnels. There is more stuff associated with that map.
Mostly use roll20 and the available assets on there.