Re: [udig-devel] CRS - "Bursa wolf parameters required."

[Paul Ramsey <pramsey@xxxxxxxxxxxxxxx>]

OK, this is evil, and highly likely to bite us in the ass going forward.
One thing we can do (prepare for the pain) is to add yet more 
information to our DatumAliases -- for each DatumAlias, add the BW 
transform parameters to WGS84. That way, if we come across a particular 
datum name, but lack TOWGS[] information, we can fill it in ourselves. 
Otherwise it'll be death and destruction quite frequently: most apps 
generating WKT do *not* generate the TOWGS[] portions of the WKT.

P

Jesse Eichar wrote:
> On Tue, 2005-04-19 at 16:49 -0400, dblasby@xxxxxxxxxxxxx wrote:
>
> > Jessie,
> >
> > Paul ramsey recently updated the epsg.properties file so it has more
> > information in it.  3005->4326 didnt work a few weeks ago, it now
> > works.
> >
> > It highly likely that you're using the old epsg jar.
> >
> > dave
>
>
> So I've figured out the problem.  The .prj file doesn't have enough
> information so that the bcalbers crs object that is created does not
> have the bursa wolf parameters that are required.  The EPSG data base
> and properties files do however.  To make the transform work you need to
> add TOWGS84[0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] to the datum declaration
> in the .prj file of bc_roads.
>
> I made the change on my local machine and I can now make the CRS change.
>
> Jesse
>
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