[OSM-talk] PDOP, HDOP, VDOP

[Aun Johnsen (via Webmail)]

HDOP is of most interest for you, that is the horizontal delution of your
position, that means how far from the logged position on the ground you can
be. VDOP is the same value vertical, in other words, the error in the
height, and if I am not entirely wrong, PDOP is the entire sphere (make a
ball with your possition in center, and you are somewhere inside that ball.
DAGE and DSTA I am not too certain about, but think that has to do with age
of signal and satellites in view. My advice is to keep HDOP and leave the
others. On my checklists at work we note HDOP and EPE (EPE is error eclips,
based upon a complicated formula on HDOP, satellite constillation (how they
are spread on the sky) and the results of any augmentations). It is not
likely that any handheld units can calculate EPE.

-

On Mon, 10 Aug 2009 09:26:08 +0200, Konrad Skeri <konrad at skeri.com> wrote:
> My GPS logger can save PDOP, HDOP, VDOP, DAGE and DSTA precision data.
When
> 
> converting to GPX-track I can exclude points based on *DOP values.
> 1. Are there any use for DAGE and DSTA? (I have them disabled - enableing
> them 
> decreases the estimated trackpoints in memory by 16%)
> 2. Which of the *DOPs are useful for this kind of filtering.
> 3. Do you happen to have some suggested values of *DOP when not to
include
> the 
> trackpoint?
> 
> regards
> Konrad Skeri
> 
> _______________________________________________
> talk mailing list
> talk at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk

-- 
Brgds
Aun Johnsen
via Webmail