Am 18.03.2012 um 18:39 schrieb 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.
course is the direction of movement relative to the north-direction. > > Anybody could confirm that GTA04 gives this as well? (I've just asked > the gta04-owner list too). Also: What about orientation? Yes, the GTA04 chip provides all these NMEA records: $GPRMC $GPGSA $GPGSV $GPGGA Nikolaus > 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 ) >> > > > > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
