how exactly would I calculate an average of a fixed gps reciever to eventually get a more accurate lat/lon ?? if you take two lat/lon's average, then do this with the very next available lat/lon is this any good? or if you take 10 lat/lon's get average then average this with the next ten what's the best way to do this? thanks -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.