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Ellipsoid vs. geoid

When an altitude is measured in wgs84, do we mean referred to the geoid or the ellipsoid? Both are part of the wgs84. I assume it is the latter one. Maybe we should mention that explicitly.

What about referring to the geoid directly?


would be more specific. --Travelling salesman 20:24, 8 April 2011 (BST)

Changed page to clarify. --Travelling salesman 16:45, 3 May 2011 (BST)

Removed "stuff"

I'm really not sure if User:grin was proposing the use of the 'alt' tag, or documenting something which everyone agrees on under the heading "Stuff", but that whole section was in contradiction with the information on Key:ele page, and I'm more inclined to trust a page where there's been some attempt to write clearly. I suggest we go with what's there, and if we want to propose an 'alt' tag, we need a more clearly written proposal page. -- Harry Wood 01:16, 15 June 2012 (BST)