[ gpsdrive ] .gpx conversion

[Guenther Meyer]

Am Mittwoch 01 Oktober 2008 schrieb chris h:
> On Wednesday 01 October 2008 05:11:21 Hamish wrote:
> > > Last issue is to extract the route from the gpx file as
> > > this does not display.
> >
> > more details please.
>
> Route only displays when you tick off tracks otherwise only waypoints
> appear. The accuracy of the route however is dependent on the scale of the
> map. It seems that the algorithm? used to draw the route wants to connect
> the end points at higher levels of zoom. Once you zoom down to a lower
> scale the route aligns itself with the waypoints. In some cases this has to
> be as low as 1500 pending how close the tracks are together. ie: entering
> and leaving port. Its actually easier to understand via a graphic.
>
> Then again I am working on a file not generated by me rather a friend who
> is in transit down the east coast of Canada/US...generated by a garmin gps
> unit and extracted using easy gps according to the file data on windows XP.
>
> > what do the tags in the internals of the gpx file look like?
>
> file is almost 1 meg but the interesting part is at the top;
>
> ----------------------------------
> <?xml version="1.0" encoding="UTF-8"?>

> ----------------------------------
>
what do you mean?
the extensions? those are currently ignored.
depending on how you open the file for gpsdrive, some parts are ignored.

> > Options -> Import -> GPX Route?
>
> Need to upgrade if this is available. Not available on pre4
>
please take care, tracks and routes are different things and handled in a 
different way!
a track is a recorded path that someone already has followed. in gpx this is 
represented by <trk> and <trkpt> elements. tracks can only be recorded and 
viewed in gpsdrive.
a route is a path that you want to go, represented by important corner marks,
in gpx as <rte> and <rtept>. in gpsdrive routes can created, edited and 
viewed.

some programs seem to export routes as gpx tracks, which is not gpx standard.


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