Just found this sight. Great information here. Recently got back into Cycling after a 30 year leave. I have been using the free Cyclemeter App for IPhone for five week now. This past weekend I was riding through a paved path with very tall trees on either side. There are no leaves on the tree this time of year. When I finished my ride I checked the Cyclemeter and only a portion of the ride was showing. From the ride map ,it seems that the area outside of the trees was showing and the area in the trees was not. Does anybody know if this is a normal occurrence on other cycle computers or just this free one?