Mine, at least, doesn't produce directly gpx, but just logs nmea
sentences. GPSbabel correctly outputs the hdop, vdop and pdop in GPX
files during the conversion. I have no idea of how "exceptional"
compared to already uploaded tracks that is though...
Yann
Le 20 mars 09 à 16:25, Ed Avis a
>From my experience with my Garmin unit (which, ironically enough, does not save
error values with the track logs, but does show an error circle on screen), the
GPS error does give a reasonable indication of when the current position is
likely to be inaccurate (for example when inside a building).
Andy Deakin wrote:
> If the hdop values run between 0-50, in mysql you would only need a
> tinyint (1 Byte) so to store this for all 727425591 trackpoints would
> take up less than a GB. I don't think it is worth reparsing all the
> files, but just because something is not done in the past does
Tom Hughes wrote:
> Yann Coupin wrote:
>
>
>> You know what to do in version 2 of the track download API, right ? ;)
>>
>
> Well only if we want to reparse several hundred thousand tracks, and
> provide storage space for hundreds of millions of hdop values in the
> database and we believe
Yann Coupin wrote:
> You know what to do in version 2 of the track download API, right ? ;)
Well only if we want to reparse several hundred thousand tracks, and
provide storage space for hundreds of millions of hdop values in the
database and we believe that the benefit from doing do (which is
You know what to do in version 2 of the track download API, right ? ;)
Yann
Le 19 mars 09 à 11:20, Andy Robinson (blackadder-lists) a écrit :
> That’s correct; the database only holds the location for each
> trackpoint and
> not any other data. You need to download the original tracklogs for
Yann Coupin wrote:
>Sent: 19 March 2009 8:22 AM
>To: talk@openstreetmap.org
>Subject: Re: [OSM-talk] GPS track precision (was "GPS track upload
>working?")
>
>As an aside, while I was using some traces I made and I wanted to
>compare them to existing one, I realiz
As an aside, while I was using some traces I made and I wanted to
compare them to existing one, I realized that downloding points using
the API doesn't return the hdop that was available in the original
file, this is really a shame as it's an important info to judge the
quality of tracks...
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