On Wed, 9 Oct 2019 at 11:47, Gareth L <o...@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 r...@garrett.co.uk _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
