More excellent work Jacktannery !! I LOVE the dragon nests. I like the idea of the compass roses as a grid but for some reason my mind wants to see them as pillars instead. Either way this is very good.
Even if I am correct, I would still advise you to follow your heart. This whole Cartographers Guild thing, it seems to me, is more about passion and skill and learning new techniques than it is about definitions and rules.
Kingdom Of Shendenflar Campaign Setting (WIP)
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After some thought I have decided to double the scale of the map - I always thought I might do this. The walls are a bit too thick, but otherwise it should not make too much difference. Here is the final version of the exterior map (in 2 maps for size) - with a grid. I added a chest by Bogie (thanks Bogie!) in one of the towers.
And here is the last bit - the interior of the study. Again I doubled the scale. I just need to fix up the transition between the two maps (the last step is a bit lost) but otherwise I think this is done. The potions are supposed to be massive.
EDIT: added ropes & fixed a couple of errors. Finished now.
EDIT2: fixed another error, and mounted it onto the previous map. This has to be done in two halves: