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Re: [udig-users] Overriding existing CRS
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Hi Peter,
I have used the epsg.properties file exactly for the purposes you need.
In Italy we have for example a 3003 epsg code, but then we have 3 sets
of parameters that lead to a better precision in different parts of
Italy. Since those are always used over 3003, we created 3 new codes
by adding 30031000, 30031001, 30031002 that have modified Bursa Wolf
parameters.
If your projection is a well known in your country you can also think
to add it permanently to uDig. Else you can just change the
epsg.properties file for you particular purpose.
Ciao,
Andrea
On Wed, Feb 22, 2012 at 11:37 PM, "Peter Mozolík (Gmail)"
<petermozolik@xxxxxxxxx> wrote:
> Hello,
>
> I'm new to uDig. I have few questions.
>
> 1. Is it possible to override internal definition of existing CRS (e.g I
> want to modify TOWGS parameter). I have found file "epsg.properties" in
> directory <UDIG>/plugins/net.refractions.udig.libs_<version>. I guess its
> purpose is to add new CRS into uDig, but I'm not sure about uDig behaviour
> if I use same code (and eventually name) as already defined CRS.
>
> 2. Could you please exaplain how internal db of CRS definitions is built, I
> mean if there is some automatic process to build internal db from official
> epsg registry. How often is internal database of CRS updated?
>
> 3. Does uDig support ESRI specific map projection parameters 'X_SCALE',
> 'Y_SCALE', 'XY_PLANE_ROTATION' used in some projections e.g. Krovak.
>
>
> Thanks
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