Plane 10 of <i>Beyond Countless Doorways</i> has no map of the plane's city, but there is an "aerial shot" drawing of it on page 121. It is not signed but it seems to be of the style of Eric Lofgren, who drew the other pictures for that plane.

Did the artist use a map to draw that?

If not, it should be possible to "decompile" a working map from the drawing; probably not of each building but at least of its major streets and central plaza. Assume that the city is circular and that the normal rules of perspective apply...