I'm a newcomer to astrophotography and I'm still accumulating equipment to begin.
However, I used Google Earth satellite view to identify a point where I can place my mount next to my home and another on the south axis across a valley. Fortunately, this happened to coincide with the edge of a building 2km away.
When I set my mount up I used the level app on my smart phone to give a reasonably accurate measurement for my latitude. When I hooked up Polemaster for its first trial run I immediately got Octans trapezium on the screen- infact Sigma was almost centre. Probably a lot of luck too I know, but Brian might be able to use Google Earth at least for an accurate north south alignment.
Mick