[ gpsdrive ] Few questions..

[Hamish]

> > if you have your route as gpx-file, it should be possible to
> > simply load it.
Branko wrote:
> I was really looking for something more simple.

can't get much simpler -- put your points in a file, run
gpsbabel to convert that to a GPX route, done in 1/10 sec.

> Boat navigation for up to 10 points to check. No fancy routes.

this is essentially what I do. In QGIS we digitize a 10-15 point
line over a chart or aerial photograph to set up our survey
line. the line is saved locally by qgis as a shapefile. then we
use QGIS's GPS output tool to make GPX route and waypoint files
for the line. we then both upload the GPX files into the GPS
via gpsbabel and show them on the gpsdrive display too with the
file -> import -> gpx route option. then we run the lines as
close as we can steer.

It's my hope to activate the "cross track error*" dashboard item
soon, but I got stalled. I think all it really needs is to be
able to remember what the last route point was after it has
passed it.

[*] XTE is how far to the left/right off the planned track line
you have drifted (perpendicular)


> As simple as could be.

I find the above solution very easy. gpsbabel and QGIS output
tools make it a one liner to convert to GPX.

> Several devices should send GPS location, I'm supposed to
> receive it and display it on screen with device unique name
> (which is also sent).
> If no data - no display. I'm not interested in using databases
> for this. As I've written in first mail, I can use way.txt,
> but this is more promising. More elegant.

which is essentially AIS delivered by friendsd, something we've
been thinking about for a while, or pretty much what friendsd
does already.

see also gpsd's multiple GPS input on one machine, and gpsdrive's
--gpsd-server=<SERVER> option: "servername for NMEA server (if
gpsd runs on another host)"


Hamish