Well, they're as major as it gets in Bisley. Done by car, interesting to see how variable the GPS fix gets when there are trees, but as I'm filling in (small) blank spaces it doesn't matter too much. One problem I find is how to decide when to stop; there's always another turning I haven't done...this will get easier once I get on my bike; the cost of thinking 'just another street' will get a lot higher.