[udig-devel] Re: [Geotools-devel] The World's on its side! (projection i

[Martin Desruisseaux <martin.desruisseaux@xxxxxxxxxxxxx>]

Paul Ramsey a écrit :
> The .prj file is saying that the first axis is Lat and the second  axis 
> is Lon. Open the .shp portion and inspect the actual ordinates.  It 
> seems likely to me that this is an error in the .prj file in this  case, 
> because if it were correct geotools would have actually done  the 
> correct axis swap and things would have worked right.  My guess  is that 
> geotools is doing everything right, but that the input  information is 
> actually wrong: in addition to checking the ordinates,  try reversing 
> the order of the AXIS elements in the .prj, to make  sure geotools is in 
> fact picking them up and trying to use them (I  think it is).

Paul is right, it is a good idea to inspect the actual ordinates.

I also confirm that the WKT parser should pickup the AXIS elements, and 
CoordinateOperationFactory performs automatically the axis swapping if 
needed.

Note that if the AXIS elements need to be interchanged in the .prj file, 
then the result should not have an AUTHORITY["EPSG","4269"] element 
since it would not be EPSG:4269 anymore. Latest Geotools implementations 
(on trunk) use the AUTHORITY element in some cases for fetching 
additional information in the EPSG database, like Bursa-Wolf parameters. 
There is safeguards against wrong AUTHORITY element, but it is always 
safer to keep them accurate anyway.

	Martin.