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[udig-devel] Re: First (of many) reproject question
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On Thu, 2004-09-12 at 09:31 +1100, Martin Desruisseaux wrote:
> Jody Garnett a écrit :
> > If I messed up on this one I really would like to fix things as soon as
> > possible because all DataStores, Lite renderer and UDIG
> > are funneling through the CRSService API. It may be that CRSService
> > wants to go and live next to all the other CRS code,
> > it operates as a Facade for that module after all....
Or it could stay with data, since it applies CTS to features.
>
> We will try to move CRS service in the CRS module. There is some step to
> follow for that:
>
> 1) Port the CRS authority factories based on WKT property file;
> Rueben was volonter for that.
I plan to port the authority factories this weekend. It should not take
long. I also started implementing the hotline oblique mercator, but will
make sure the factories get a higher priority.
>
> 2) Port CRSService itself. Some functionalities of this class may be
> dispatched in more than one class, especially various CRS factory
> interfaces and ISO 19107 (geometries) methods. For example the two
> following methods:
>
> CRSService.reproject(sourceCRS, targetCRS);
> CRSService.transform(Polygon, MathTransform);
>
> can be replaced by the following ISO 19107 method:
>
> Geometry.transform(targetCRS);
>
> See:
>
> http://geoapi.sourceforge.net/snapshot/javadoc/org/opengis/spatialschema/geometry/Geometry.html#transform(org.opengis.referencing.crs.CoordinateReferenceSystem)
>
> As soon as we can, we should abandon JTS in favor of ISO 19107 objects
> (actually, wraps JTS objects into ISO 19107 wrappers), in which case the
> above service will be available and replace the two above-cited methods
> in CRSService. Those CRSService methods are actually workaround for JTS
> not knowing what CRS and transformations are.
>
> Note that a guy in our laboratory is just starting to look for wrapping
> JTS in ISO 19107 objects. But it will take a while before it is ready...
>
> Martin.
>
