Re: [Geotools-devel] coverage styling freezes

[andrea a. <and...@gm...>]

Quick update.

The samplemodel of the image is modified by the styling operation.
Ad since b&white map was in MultiPixelPackedSampleModel, it resulted
nicely handled (those images are heavily compressed).
After the styling the image has a PixelInterleavedSampleModel model,
which very probably makes it explode.

Hmmm, so for these types of maps, it is better not to play with style.
Is there a way to make just a color transparent?

Andrea



On Thu, Aug 19, 2010 at 9:26 AM, andrea antonello
<and...@gm...> wrote:
> Hi,
> as part of the new raster style editor for udig I am trying to style a
> black and white geotiff.
> My first test is to just make two ColorMapEntry to change the two main
> colors to something else:
>
>        ColorMap colorMap = sf.createColorMap();
>
>        Color one = Color.green;
>        Color two = Color.red;
>
>        ColorMapEntry entry = sf.createColorMapEntry();
>        entry.setQuantity(ff.literal(0));
>        entry.setColor(ff.literal(one));
>        entry.setOpacity(ff.literal(1));
>        colorMap.addColorMapEntry(entry);
>
>        entry = sf.createColorMapEntry();
>        entry.setQuantity(ff.literal(1));
>        entry.setColor(ff.literal(two));
>        entry.setOpacity(ff.literal(1));
>        colorMap.addColorMapEntry(entry);
>
>        rasterSym.setColorMap(colorMap);
>
>
> That would be the same as the non programmatic way add the following to the sld:
>
>  <FeatureTypeStyle>
>     <Rule>
>       <RasterSymbolizer>
>         <ColorMap>
>           <ColorMapEntry color="#00FF00" quantity="0" />
>           <ColorMapEntry color="#FF0000" quantity="1" />
>         </ColorMap>
>       </RasterSymbolizer>
>     </Rule>
>   </FeatureTypeStyle>
>
>
> Alright, what happens is that the image that before was reading and
> displaying nice, now starts freezing everything as if it was reading
> everything and not just the overviews.
>
> Can anyone with a proper insight give me some advice about how to proceed?
>
> Also, is there a different way to just alpha a single color in a coverage?
>
> Thanks,
> Andrea
>