7th May 2010, 08:55 AM
Jack Wrote:You can increase the accuracy of you readings by taking lots of the same point, then averaging them....I once helped a friend plot a readings from a hand-held GPS against time. Very intersting result, from what I remember it varied as a simple sine curve! But that was back in the day when the signal was scrambled.
The one time I left a hand-held GPS sitting on the ground in the middle of a quarry for an afternoon (amazingly no one ran it over!), the points it recorded plotted an elipse 8m long and 5m wide - does that count as accurate? The thing was claiming a 2m or less accuracy throughout! The 'GPS' systems that use phone masts as fixed points seem a far safer bet in Britain, at least in those rare locations where you can actually get a decent phone signal - the only real drawback are the phone bills....
