[Talk-GB] accurate GPS

Russ Garrett russ at garrett.co.uk
Wed Oct 9 10:54:03 UTC 2019


On Wed, 9 Oct 2019 at 11:47, Gareth L <o.i at live.co.uk> wrote:
> Are you including the continental drift? That will make etrs89 gps coords be about 60-70cm off by now

That's the total net error since ETRS was established, but the ETRS
reference frame moves with the Eurasian plate and corrections are
issued, so presumably the GPS receiver has some of those incorporated.
I think for the highest accuracy it's probably worth taking the
position as WGS84 rather than doing the coordinate system
transformation on-device, but I'm not 100% sure on this.

-- 
Russ Garrett
russ at garrett.co.uk



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