[OSM-newbies] GPS settings

[Andrew Errington]

On Wed, January 20, 2010 20:57, Craig Wallace wrote:
<snip>
> Most GPS devices will always record the tracklog in WGS84 datum, no
> matter what the GPS is set to. So you can set it to your local grid / local
> datum if you want, the tracklog will still be WGS84. All this affects is
> the numbers displayed on the screen.
>
> I'm pretty sure this is case for all Garmin GPS devices. Though other
> brands may be different, so worth checking.

I don't know if the datum affects the *stored* track points, but it does
affect the *reported* lat/lon in NMEA sentences.  At least it does on a
Garmin Geko 201.  Something to be aware of if you are doing live GPS
tracking.

Since this is a newbies list I would recommend that everyone should use
the WGS84 datum (and definitely for OSM) except when you know you don't
want it.

HTH,

A