Attilla Danko has some really useful information on his website http://cleardarksky.com/csk/ http://cleardarksky.com/csk/ He can generate clear sky charts for

Attilla Danko has some really useful information on his website http://cleardarksky.com/csk/ http://cleardarksky.com/csk/ He can generate clear sky charts for most of Canada and the U.S. You can see light pollution maps and there are links to this Google Maps light pollution overlay: http://djlorenz.github.io/astronomy/lp2006/overlay/dark.html http://djlorenz.github.io/astronomy/lp2006/overlay/dark.html