Re: Where Exactly Is The Equator



Tapio Sokura wrote:

There's a difference between using a WGS datum and a datum (now) close
to it. The EUREF system that is being transitioned into in many parts of
Europe is at the moment within a meter of WGS-84. The difference is due
to EUREF being anchored into the Eurasian tectonic plate while WGS-84 is
not. EUREF is not a global compromise (it's a European compromise), but
its parameters have been selected so that the coordinates are close to
the WGS-84 global compromise.

Exactly! -And in the US we do the very same thing by
surveying with the NAD-83 datum instead of the WGS-84
datum... NAD-83 considers the North American Continent not
to be moving (which it is)...

Also there is a difference in the "center of the earth" of
the two datums by about 2 meters...

--
Jack

Get general GPS information at:
http://www.gpsinformation.net/
.