[/quote]

There could be a couple of factors here. I used to take a reading as soon as I reached a site. In most instances the GPS thinks you're still moving and so can add a few metres. Then, if my reading was 10m out due to the inaccuracy of the GPS and your reading is 10m out then that could give a difference of 20m between readings. Now I always put my GPS down while I'm taking photos and then take a reading as I leave. I hope this gives a more stable and accurate reading.[/quote]

Until we become WAAS enabled we will just have to put up with the inaccuracies , sometimes we will be lucky though. I usually find that returning to a gps reference witth the same device is rarely out that much but there is plenty of potential for inaccuracies .