On Thu, 3 Nov 2011 19:37:06 +0000
Neil Greenough <
neilgreenough@...> wrote:
> I'm currently writing a script in Python which records the longitude,
> latitude and speed from the GPS device. What I'd like to do is also
> record the direction of travel / bearing for each hit (ie. North,
> South, East, West). I've tried researching this but to no avail. Any
> suggestions on how this can be implemented or does anyone have any
> examples of Python code containing bearings?
Direction of travel, or heading, and bearing are not the same thing.
Heading is the direction in which you are moving, i.e. your course
made good. Bearing is the angle from the heading to a feature.
That nitpick aside... In C:
if (gpsdata.set & TRACK_SET) {
formatTrack (gpsdata.fix.track);
}
gpsdata.fix.track is a double, and seems to be a value in the range 0 to
360, of degrees from true north, where 0 and 360 are both true north.
(To be really pedantic, it should be either 0-359 or 1-360, but I
actually prefer the extra degree.)
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