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Re: [udig-users] Overriding existing CRS
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Hello Andrea,
Thank you for your reply.
Ok, I understand that you have used "epsg.properties" file to add three
new custom CRS definitions into uDig. My original question was if custom
CRS definition from "epsg.properties" file overrides internal definition
of CRS of uDig, provided that I will use the same code.
The problem you described with 3 different sets of parameters is related
to more general problem of uDig. I think that the problem is that
definition of CRS should be separated from definitions of
TRANSFORMATIONS. Then you could have relation 1:N.
Please could you check the other questions from original post.
Tahnk you very much.
Dňa 23. 2. 2012 9:22, andrea antonello wrote / napísal(a):
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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