I've been reading this site
http://www.aerialsandtv.com/testimonials.html#UsingGoogleToLineUpAnAerial
Google Earth and it's ruler. Distance, compass heading, elevation.
Now with my compass I know in which direction to point my aerial. I can even see just how much of an obstruction there is along the route with elevation. Still may have to do something about the trees though!
I thought I was pointing to PineHill, I wasn't! But by getting in close on Google Earth and running a line from PineHill back to my house I now know where to place my aerial to have the best chance to 'see around' the tall metal roofed house next door, same for Waiatarua. Brilliant!
This is going to be interesting!