[Proj] GeographicLib geoid calculations

Noel Zinn (cc) ndzinn at comcast.net
Fri Oct 19 08:55:47 EST 2012


The MSS models have academic uptake and they're creeping into the oil 
industry, which is my bailiwick.  Follow the links below for DOTs of the 
North Sea and the Gulf of Mexico:


You'll see that the differences between the geoid and the MSS are not 
insignificant, nor is the gradient insignificant in places.


Noel Zinn, Principal, Hydrometronics LLC
+1-832-539-1472 (office), +1-281-221-0051 (cell)
noel.zinn at hydrometronics.com (email)
http://www.hydrometronics.com (website)

-----Original Message----- 
From: support.mn at elisanet.fi
Sent: Friday, October 19, 2012 7:36 AM
To: PROJ.4 and general Projections Discussions
Subject: Re: [Proj] GeographicLib geoid calculations


is there any experience about how this DTU10 is accepted by people and how
wide its usage is? I am assuming that most people think that what is printed
on the mountain elevation signs must be the truth. - The question is what is
the surface that is most accepted as any local MSL? (geoid or DTU10 or
some other MSS model)?



"Noel Zinn (cc)" [ndzinn at comcast.net] kirjoitti:
> Regarding Charles Karney's point (1) below, there are Mean Sea Surface
> models available.  DTU10 is a recent MSS from Denmark.  Follow the link
> below to research/download:
> http://www.space.dtu.dk/English/Research/Scientific_data_and_models/Global_Mean_sea_surface.aspx
> The difference between the (level) geoid and the (non-level) MSS is 
> Dynamic
> Ocean Topography (DOT).

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