"The YoYoMan" escribió en el mensaje
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Ep!

where is the zero point of "sea level" (gps coordinates) ????

in what sea/ocean ????

in what point ???
I think the reference is not a point but a surface, the geoid surface, which
is an oblate spheroid that is determined I think by measuring the gravity (I
don't know how, thpough). This gives 0 meter altitude.


how is measured altitude of mountains ?

how mach meters have the Gaorisankar (Everest) ???
some people say 8.848 others 8.850... what is correct ???

Actually the Chinese are just sending a mission to determine the new height
of the Everest, since it is believed that Everest snow cap is melting down
due to global warming.


Dead sea is at "sea level" ???
Dead sea is approx 400m below sea level.
http://ask.yahoo.com/ask/20010920.html

the big depression in water surface in Indic ocean of -300m. is also at
"sea
level" ??

I didn't know that. Where did you find that ?


after indic tsunami and global changes in planet "sea level" also sufer
variations ???
Actually, parts of sumatra shore ahev dived under water, beacuse the
earthquake have lowered part of the island. The variation of sea level was
but transient, as far as I know.


a reveure des Catalunya, the YoYoMan :-)


Doncs si home, a reveure ! Que vagi be a Catalunya ! Coneixes-tu foros de
geología en castellá o en catalá ? En vaig buscar pero no vaig trobar rés.