[Proj] Fw: Re: GeographicLib geoid calculations

support.mn at elisanet.fi support.mn at elisanet.fi
Thu Oct 18 09:32:31 EST 2012

J Luis [jmfluis at gmail.com] kirjoitti: 
> > The geoid might be an interesting academic study but the ellipsoid is
> > a much more stable zero reference and since the earth is not stable
> > by its nature (plate dynamics) it is obvious that the geoid will never
> > be fully fixed in time.
> Academic?

sorry, I really meant "Alchemy" ;)

> The water flows down the geoid, NOT the ellipsoid.
> Te ellipsoid is not fixed in time either, if not for isostasy an land
> masses erosion,  sea level changes.

something like that...


> Joaquim

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