There is an equals ignore metadata trick that can just compare the CRS
values (and will consider them equal even if some of the names are
different).
http://docs.geotools.org/stable/userguide/library/referencing/compare.html
Jody Garnett
On Tue, Jul 22, 2014 at 3:01 PM, Gabriella Turek <gabriella.tu...@niwa.co.nz
> wrote:
> I am asking because I just realised the following
>
> CoordinateReferenceSystem crs1 = CRS.decode("EPSG:27200");
>
> CoordinateReferenceSystem crs2 = CRS.decode("EPSG:27200");
>
> CoordinateReferenceSystem crs3 = CRS.parseWKT(crs2.toWKT());
>
> assertTrue(crs1.equals(crs2)); OK
>
> assertTrue(crs2.equals(crs3)); FAILS
>
>
> The reason I came to this was because I was trying to make sure that
> when I am reading data, it either
>
> has projection information, or the user has to prompted for it.
>
>
>
> If it doesn’t, there is no way for me to know unless I check that
>
> 1. the crs is either null when reading of shape files
> 2. the crd is set to the “default” when ASCII grid files or
> georeferenced images
>
> What I found is that even if the .prj file is present in the latter case,
> the statement
>
> assertTrue(gc.getCoordinateReferenceSystem().equals(crs1)); (where gc
> is the GridCoverage2D)
>
> always returns false, even if the .prj file is that for EPSG:27200
>
>
> So I suppose I have to look at the code to make sure I am indeed looking
> at the same coordinate system?
>
> Thanx
>
> Gaby
>
>
>
>
>
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