OK, below is the last instalment: Eric's 3' grid map and the light pollution map superimposed. Still crude, but a bit less unscientific.
The two faint red lines contain the 25°-35° latitude belt identified in Bart Bok's paper (indeed, interesting reading!), and the red dot E of Kalgoorlie is the spot Andrew mentions in his post below - the nearest station happens to be called 'Seemore Downs', so someone out there agrees with him...
