[OSM-newbies] New Garmin questions

[Nick Black]

On 8/10/07, Jeffrey Martin <dogshed at gmail.com> wrote:
> I thought I read somewhere that sometimes using WAAS
> can actually decrease accuracy when the service is marginal.


WAAS is a correction service that only applies to North America.  If
you use WAAS outside of the area that its intended for it may lower
the accuracy of the unit, becuase it will be applying corrections for
the wrong area.

EGNOS (http://en.wikipedia.org/wiki/Egnos) is the EU version of WAAS -
so far as I know, if you enable WAAS on a Garmin unit in Europe, it
will use EGNOS - which will definitely enhance the accuracy of the
unit.

So in conclusion - use WAAS/EGNOS in Europe and America.

There's some quite useful informaiton on the ESA site:

http://www.egnos-pro.esa.int/education/index.html

>
> What happens if I set the track option to auto and most points?
>
>
>  On 8/10/07, Christoph Eckert <ce at christeck.de> wrote:
> > Hi Martin,
> >
> > > Do I want WAAS on or off?
> >
> > if you have good luck, enabling it leads to better precision.
> >
> > > I think the wiki said to set the track to time
> > > interval. Why not distance?
> >
> > If set to distance, you'll get less trackpoints at high speeds. 1/sec
> > usually gives you the most trackpoints the device is capable of
> > generating.
> >
> > > If I set the track to store to the microSD card
> > > then should I have wrap when full or or off?
> >
> > It depends, but in most cases you want to have the most recent
> > trackpoints.
> >
> > > When it wraps does it wrap the data on the SD card also?
> >
> > No. The SD will always contain all trackpoints collected. The option
> > only affects the internal memory.
> >
> > > Which way is the best way to set the altimeter?
> > > Can I find a highway sign with the altitude and set it by hand?
> >
> > Sorry, I have no experience here.
> >
> > HTH & best regards,
> >
> > ce
> >
> >
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> >
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> >
>
>
>
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-- 
Nick Black
--------------------------------
http://www.blacksworld.net