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

[Jesse Eichar <jeichar@xxxxxxxxxxxxxxx>]

uDig/Geotools CRS relationship.

uDig does not create any CRS objects.  All the objects are currently
created in geotools.  In geotools datastores are responsible for
creating features and FeatureTypes.  FeatureTypes contains the CRS of
their geometry.  There is no standard way that datastores create their
CRS objects. The shapefile just parses the .prj file using the WKT
parser which does not cross referencing with anything.  It doesn't know
anything about the world.  The Postgis datastore uses data from one of
its tables to create its CRS objects.  I believe that the WFS datastore
uses the EPSG CRSFactory to create its CRS objects.  

In order to be really useful, somewhere a long the line assumptions need
to be made if some data is missing.

Jesse