It's a pretty map. The only comment I would add is that the shading on the walls is a bit strange. The drop shadows indicate a light source from the top left (which is pretty conventional). However the light on the walls is brightest on the bottom right edges. This gives the impressions of the walls being concave - which feels a little odd as they should be protruding out of the page towards the viewer. If the highlights on the walls were the other way around they would jump out a bit more.

Otherwise, lovely map - especially for DM only reference!