[GRASSLIST:2324] Re: m.proj2

[Paul Kelly]

On Thu, 22 Jan 2004, Markus Neteler wrote:

> On Wed, Jan 21, 2004 at 02:10:38PM +0100, Ivan Marchesini wrote:
> > Dear Users,
> > I'm trying to use m.proj2 to translate a point from latlong ed50 coord sistem
> > to the italian sistem (gaus-boaga, rome40)
> > I have some difficulties to write the sintax of the command....
> > thank you...
>
> With 'cs2cs' (provided by PROJ4) it should be:
> LATLONG/ED50 -> Gauss-boaga Ovest/Roma40
>
> cat coordsED50.txt | cs2cs +init=epsg:4230 +to +init=epsg:26591 \
>       +towgs84=-85.88,-28.85,+49.67,-1.003,-2.383,-1.808,-27.82 > coordsGB1.txt
>
> Fuso Est:
>  Gauss-boaga Est is +to +init=epsg:26592
>
> Be sure to pick the right (local) towgs84 parameters.
>

Hello Markus
Were you able to find towgs84 parameters for eur50 in Italy? I didn't
reply to this yesterday as I couldn't find any and thought you might know.
I would put them into the GRASS datumtransform.table if I knew. The
NIMA document only seems to have some for Sardinia and Sicily but not
mainland Italy.
At least the general ones for europe should be put in in the command line
above(or does epsg:4230 already contain these?)

Also I have a slight suspicion that the ordering of latlong / longlat
co-ordinates might be different between m.proj2 and cs2cs. It would be worth
somebody confirming this anyway.

Paul