All this technology is in early days and it can't be used universally yet due to lack of infrastructure to support it. I have been using GPS for a lot of years to log data on race cars and the early stuff was just woeful to the point where we initially abandoned it altogether. The biggest issue for places like where Wayne lives is the satellite coverage is marginal, simply put there are not enough satellites at any one time to give accurate reliable positional information and in Australia at the southern end of satellite coverage it is a common problem and Tasmania suffers the worst. It will happen but for some areas of the globe that is a long way off.
Chris
Everything I like is either illegal, immoral or fattening