Re: A strange problem with my GPS receiver
From: Eikka Uikkanen (eino.uikkanen_at_SORRYkolumbus.fi)
Date: 06/20/04
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Date: Sun, 20 Jun 2004 22:18:35 +0300
"Stan Gosnell" <fakename@fakeaddress.com> kirjoitti viestissä
news:Xns950E726DB95E8stanghalpc@204.52.135.40...
> "Zeldus" <no@mail.com> wrote in news:40d538e7$0$282$626a14ce@news.free.fr:
> Don't expect the Brits to change things to
> conform to WGS84, even though that's the most precise datum extant.
Brits definitely wont change their coordinate systems to conform to WGS84,
because they are, as most European countries, changing their systems to
conform EUREF.
The reasons are:
- WGS84 is _not_ the most precise datum; read about ITRF which is
http://www.iers.org/iers/products/itrf/itrf.html (EUREF89=ITRF89=ITRF 1989)
- WGS84 is global, but since continents are constantly in motion, we need
for precise surveying a datum, which if fixed to the continent (as EUREF)
Read more: http://www.gps.gov.uk/additionalInfo/coordinateSystems.asp
ITRS and hence it's realisation ITRF are not based on the exact place of the
Greenwich-observatory.
Regards,
Eino Uikkanen
http://www.kolumbus.fi/eino.uikkanen/gb/index.htm
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