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Re: [udig-devel] transparency
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hey,
I don't know at all what code is being used to generate that image since
I no longer understand what's happened in GeoTools nor what uDig has
chosen to integrate from GeoTools. There is a slight chance that the
code on which you depend relates to the code we used for a project here.
In our case know of a similar bug, with a workaround that we have to
start with an image that has an alpha channel (RGBA).
So maybe try a run starting with an image you know to be RGBA to see if
that solves your issue.
good luck,
--adrian
On Fri, 2009-01-23 at 10:17 -0800, Graham Davis wrote:
> Hi all,
>
> I have a question about applying a transparency to a layer or coverage.
> Basically I've developed a tool for geo-referencing an image onto a map
> and warping it to match the map's CRS. The process for warping the
> image is to create a GridCoverage of the image from a derived CRS using
> a transform, then use the Operations.resample() method to get the result
> as a warped coverage. The result is the image warped to fit the CRS of
> the map. My problem is that the edges of the result where it was
> rotated are black.
>
> I'm trying to figure out the best way to make these black areas
> transparent. Is there a setting that can achieve this when I do the
> actual resampling? Or do I need to apply some sort of style/setting on
> the resulting coverage afterwards? I don't know how to achieve either
> or if there is another, better way. Can someone point me in the right
> direction? Thanks,
>
