[OSM-newbies] comparison between gpx results

[Francis Augusto Medeiros]

On 3 de abr de 2007, at 06:26, Robert Hart wrote:

>
> When I load both tracks on JOSM, the difference between the tracks
> are too big. so I feel a bit concerned about the results. So I am
> concerned which one I should use.
>
> Cheers,
>
> Francis
>
> how big is "too big"? It is quite common for two GPS trails taken  
> at different times to differ by a substantial amount, especially if  
> you had a poor signal at the time.
>
> Does your GPS give an indication of the number of satellites it's  
> getting a signal from?
> In my experience you need at least 5 well spaced satellites before  
> you can start pointing the finger at other data, sources of error.
>
> Rob

Hello Rob,

See, I have taken the same road over and over with GPS Track, and the  
results were, of course, not the same all the time, but were pretty  
much closer to each other. When I used Mobile Trail, The tracks had  
an offset for the left side, I mean, it wasn't even close of the  
average line I made with GPS Track.

Cheers,

Francis