Hi Simone,
I have solved the Style factory problem as follows:
SLDParser stylereader = new SLDParser(new StyleFactoryImpl() ,
sldfile);
I have imported the UserLayer, Style and all following classess from
org.geotools.styling (it seems that classes with the same name are also
in org.opemgis...). The methods called are shown as deprecated (I work
with 2.5-SNAPSHOT thorugh maven). Anyway, I tried to use them.
I am not able to run your example because of the line:
rsh_SLD.visit(rs_1).show();
where
SubchainStyleVisitorCoverageProcessingAdapter rsh_SLD = new
RasterSymbolizerHelper(gc, null);
final RasterSymbolizer rs_1 = (RasterSymbolizer) rule.getSymbolizers()[0];
where show() cannot be invoked on a type void. Any idea why this is?
I tried a workaround (also tried through theexecute method):
GridCoverage2D tmpgc = (GridCoverage2D)rsh_SLD.getOutput();
tmpgc.show();
but I am getting the following error:
Feb 16, 2009 5:49:01 PM org.geotools.styling.SLDParser parseUserLayer
INFO: layer name: raster_layer
Exception in thread "main"
org.geotools.coverage.processing.CoverageProcessingException:
java.lang.NullPointerException
at
org.geotools.renderer.lite.gridcoverage2d.BaseCoverageProcessingNode.getOutput(BaseCoverageProcessingNode.java:339)
at
org.geotools.renderer.lite.gridcoverage2d.BaseCoverageProcessingNode.getOutput(BaseCoverageProcessingNode.java:42)
at
org.geotools.renderer.lite.gridcoverage2d.StyleVisitorCoverageProcessingNodeAdapter.getOutput(StyleVisitorCoverageProcessingNodeAdapter.java:180)
at ch.uzh.geo.tomko.GTViewshed.GTtest.main(GTtest.java:207)
Caused by: java.lang.NullPointerException
at
org.geotools.renderer.lite.gridcoverage2d.RasterSymbolizerHelper.execute(RasterSymbolizerHelper.java:69)
at
org.geotools.renderer.lite.gridcoverage2d.RasterSymbolizerHelper.execute(RasterSymbolizerHelper.java:48)
at
org.geotools.renderer.lite.gridcoverage2d.StyleVisitorCoverageProcessingNodeAdapter$1.execute(StyleVisitorCoverageProcessingNodeAdapter.java:140)
at
org.geotools.renderer.lite.gridcoverage2d.BaseCoverageProcessingNode.checkExecuted(BaseCoverageProcessingNode.java:235)
at
org.geotools.renderer.lite.gridcoverage2d.BaseCoverageProcessingNode.getOutput(BaseCoverageProcessingNode.java:337)
... 3 more
Any help more than welcome,
Martin
Simone Giannecchini wrote:
> Ciao Martin,
> a way to achieve that is by using the RasterSymbolizer (2.5.0 and
> successive releases).
> See http://docs.codehaus.org/display/GEOTOOLS/Raster+Symbolizer+support
> for more information.
>
>
> Simone.
> -------------------------------------------------------
> Ing. Simone Giannecchini
> GeoSolutions S.A.S.
> Owner - Software Engineer
> Via Carignoni 51
> 55041 Camaiore (LU)
> Italy
>
> phone: +39 0584983027
> fax: +39 0584983027
> mob: +39 333 8128928
>
>
> http://www.geo-solutions.it
> http://simboss.blogspot.com/
> http://www.linkedin.com/in/simonegiannecchini
>
> -------------------------------------------------------
>
>
>
> On Mon, Feb 16, 2009 at 3:59 PM, Martin Tomko <[email protected]> wrote:
>
>> Dear all,
>> I am creating a gridcoverage2D (and consequently a geotiff, based on
>> processing of a source geotiff DEM), and I want to quickly visualize the
>> results of the analysis. Instead of opening it in some GIS, I would like
>> to assign a color model to the result.and display it through the show()
>> method. I tried to change the viewtype, but it does not seem to help.
>>
>> My GridCoverage2D is created as follows:
>>
>> WritableRaster hor = ...;
>> GridCoverage2D gchor = gcFactoryhor.create("hor", hor, env);
>> gchor.view(ViewType.GEOPHYSICS);
>> gchor.show();
>>
>> and I use a GeoTiffWriter to output the geoTiff. Note that ArcMap open
>> the geotiff fine (requiring classification to assign colors), as well as
>> a normal image viewer (e.g., XnView), but the result is just a binary
>> nodata/anydata black and white rendering.
>>
>> I see that it is possible to assign colors in the GridCoverage2D gchor =
>> gcFactoryhor.create(...) part, but I am not sure how to map the values
>> in the raster to the colors. Any hints welcome.
>>
>> Thanks
>> Martin
>>
>>
>> ------------------------------------------------------------------------------
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>>
>
>
>
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