So courtesy of reddit, I found out about some good web sites with respect to active airports, aerodromes and heliports and this includes private strips as well as what some might have thought were abandoned strips.
The 9km rule would apply in every case listed above because they are all licensed air facilities of one type or another. Web sites used were SkyVector, another SkyVector page and this web site which allows you to draw multiple circles of your choosing in diameter centered on points overlaid on Google Maps.
So looking at my two screen scrapes below there is very little of Calgary which falls outside of the 9km rule...
» Click image for larger version
» Click image for larger version