Fw: Re: [OSRS-PROJ] Projection parameters for Italian old IGM?

[Bud P. Bruegger]

And I just got more evidence that my suspicion below is correct:  I
just received two articles that describe the Italian reference systems
and one of them states that the long of Rome,M.Mario in the Rome40
datum is 12d27'8.4" while in the European Datum of 1950 it is
12d27'8.933".  Bingo...

So it seems I have to figure out how to change the datum from Rome40
to ED50...

-b


On Wed, 30 Apr 2003 11:44:06 +0200
"Bud P. Bruegger" <bud at sistema.it> wrote:

> I wrote:
> 
> > Could there be a datum shift to consider???  Any clue where I'm going
> > wrong?
> 
> My current suspicion is that the lat/long coordinates based on the
> intl. ellipsoid "oriented to Rome, M.Mario" may mean that the datum is
> rome40  ????  (I found some possibly related ?? material on the Internet
> that used Rome40...)
> 
> Could the problem be that I need to convert from rome40 to European
> Datum of 1950?
> 
> 
> many thanks
> --b
> 
> 
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