Re: [Geotools-devel] GeoServer, GeoTools 2.5 and UOM

[Andrea A. <aa...@op...>]

Milton Jonathan ha scritto:
> Hey there,
> 
> We were starting to play around with GeoServer, and were noticing that, 
> since GeoServer is still on GeoTools 2.5.x, it does not have the UOM 
> attribute on the Symbolizers.
> 
> We were wondering then about the next moves of the GeoServer project 
> and/or GeoTools:
> - Will GeoServer move to GeoTools 2.6 soon?
> - Will UOM support ever be backported to GeoTools 2.5?

GeoServer trunk is already on 2.6. Look for the releases labeled 
"2.0-betaX", those are using gt2 2.6 (or checkout GeoServer trunk
instead of 1.7.x)

> Other than that, we would probably have to spend a little more effort on 
> changing the GeoTools renderer so that the symbolizers rescale according 
> to the UOM attribute. Right now, we are applying a 
> "UomRescaleStyleVisitor" before calling the GeoTools renderer, but I 
> guess that's not so nice for GeoServer right?

Yeah, sounds like a workaround instead of an integrated solution.
I guess a quick way to solve it and hide the problem "under the carpet"
would be the renderer to deep clone the style, then pass the visitor
over the the cloned style.

> 
> What do you think? Now that I am taking a closer look at the rendering 
> process, it seems that we could manage this rescaling withing 
> SLDStyleFactory, which could check the UOM attribute and generate a 
> Style2D with the appropriate rescaled size.

Yes, that would be preferable indeed. I guess we'd have to inform
SLDStyleFactory about the current scale, so a little API change
is needed.

Cheers
Andrea


-- 
Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.