Advance OpenStreetMap surveying with GTA04?

[Mayeul Kauffmann]

Thanks a lot ed!
Having a gpx extract is great (I'm currently playing with it).
Yes, 'hdop', 'fix' and 'sat' are the 3 main fields I need for precision.
What is "course"? I found "Instantaneous course at the point" (in
degrees) [1] but I do not understand.

Anybody could confirm that GTA04 gives this as well? (I've just asked
the gta04-owner list too). Also: What about orientation?
Thanks!
Mayeul


[1] http://www.topografix.com/gpx_manual.asp#course


Le dimanche 18 mars 2012 à 17:57 +0100, Ed Kapitein a écrit :
> On 03/18/2012 02:25 PM, Mayeul Kauffmann wrote:
> > Le dimanche 18 mars 2012 à 14:34 +0200, Timo Juhani Lindfors a écrit :
> >
> >> I used another GTA02 to make audio notes and a cheap and small digital
> >> camera to take photos. As long as all clocks are synchronized you can
> >> combine all the data with your netbook later.
> > Thanks a lot Timo! I already do this with my Garmin and gpscorrelate
> > (GNU/GPL), but without HDOP nor heading.
> > Can you save the HDOP [1] with the GTA02?
> > Do you have access to heading in the command line (with possibility to
> > pipe it)?
> >
> > Thanks!
> > Mayeul
> >
> > [1] http://en.wikipedia.org/wiki/Dilution_of_precision_%28GPS%29
> Hi Mayeul,
> 
> If, on  a GTA02, you use a nmea log  and gpsbabel to translate it to gpx
> format, you get:
> 
> <trkpt lat="51.987431167" lon="4.337932667">
>   <ele>-16.800000</ele>
>   <time>2012-03-17T14:01:21Z</time>
>   <course>61.230000</course>
>   <speed>1.071073</speed>
>   <fix>3d</fix>
>   <sat>8</sat>
>   <hdop>1.580000</hdop>
>   <vdop>2.140000</vdop>
>   <pdop>2.660000</pdop>
> </trkpt>
> 
> Would that give you all the info you need? HDOP and course  are present.
> ( the above is just one sample of a track i walked yesterday, with a GTA02 )
>