i have a gramin 310xt and am quiet happy with it so far however when the watch is still it is showing that on speed it is moving at varying speeds, itryed to start an excercise to see if this speed would accumilate to distance and unfortunatly it did. this makes me wonder how accurate is the both the speed and distance being measured when a static watch is showing movement .......any advice??
There will always be a little drift. GPS isn't perfectly accurate. I typically get accuracies of ~25 feet, so think of a 25 foot circle around you. It doesn't know exactly where you are in that circle, so the location it thinks you are in will wander a bit within that circle. Sure, it can add up to a non-zero number, but in practice, it's a small error.
so i presume that once moving speed should be accurate also i have seen reports that elevation values arent realiable but was wonder when uploaded to garmin connect is this figure for elevation accurate due to google maps??
The overall speed is pretty accurate, since it is just the total distance divided by the total time. The instantaneous speed is less accurate because of the point-to-point GPS inaccuracy. The longer you average, the better the accuracy, so something like your mile splits will be relatively accurate.
On the Forerunners, the elevation is not very accurate. Some people think that the latest firmware update for the 310 increased the elevation accuracy, but I don't think so. Correcting the elevation in GTC and/or GC has been a long-promised feature that has not been added yet.
thanks for your help i was a longtime polar user(20yrs) and i have to say so i like the garmin a lot...sorry to keep poppin questions but do you know is there anywhere in garmin connect to see time in each heart zone from a seison(cycle or so)
