[Talk-ca] Primacy of GPS Traces (was Re: Internal CanVec conflicts)

[Tom Taylor]

As a geocacher, I'm unhappily aware that different brands of GPS give 
different results, with differences in the order of 10 meters for an 
individual point. I suppose a track should be better, since there is an 
internal consistency check, though not if the difference is due to 
systemic causes. As it happens, in this case I had my own GPS trace to 
work with, and it aligned reasonably well with the Bing image of the 
path I was following.

One thing I'm not sure of: were my GPS traces uploaded with the edits, 
or did I have to do something special to upload them?

On 15/11/2012 8:20 AM, Harald Kliems wrote:
> Hi Tom:
> welcome to OSM and congratulations on your first edits! Yes, it sounds
> like you did the right thing. One thing to look out for: Bing images
> are not always aligned 100% -- they can be offset by several meters.
> Usually this is not a problem but if there are any GPS traces
> available in your area you (most likely to be found along major roads)
> you can use those to make sure that the imagery is not off. In JOSM
> you get the GPS traces by checking the "Raw GPS data" box in the
> Download window.
> Happy editing,
>   Harald.
>
...