Ciao Matt,
thanks for the effort, I am already looking it into this issue.
First suggestion though, use CRS.decode("EPSG:4326") instead of
DefaultGeographicCRS.WGS84, this makes easier interoperability with
other software.
More suggestion will follow :-)
Simone.
On Wed, May 28, 2008 at 7:58 PM, Matt Foster <[EMAIL PROTECTED]> wrote:
> Hi Simone,
>
> I got a test case put together. I wrote the data out to a binary file using
> DataOutputStream, which should be fully portable and it compressed nicely as
> well. I just zipped up my Netbeans project directory. If you don't use NB,
> I think you'll still find everything easily. I also included the SLD I'm
> trying to use to make part of the image transparent, so you could look at
> that too, if you'd like.
>
> One interesting note...I found that if I read the Geotiff back in with
> GeoTiffReader it will get the correct CRS. However, as I mentioned before,
> neither GDAL nor ESRI ArcMap report the CRS properly.
>
> Go to this URL...
> http://www.srh.noaa.gov/anonymous/OUN/
>
> and get GeotiffTest.zip. That should contain everything. Let me know if
> you run into any trouble.
>
> Thank you again for your help!
>
> Matt
>
>
> Simone Giannecchini wrote:
>
> Ciao Matt,
> if you could provide a test case which is as isolated as possible
> (with sampe data as well) I could try to reproduce this issue and fix
> it asap.
> Simone.
> On Thu, May 22, 2008 at 4:57 PM, Matt Foster <[EMAIL PROTECTED]>
> wrote:
>
>
> Hi Simone...see my responses below.
> Ciao Matt,
> please read below...
> On Fri, May 16, 2008 at 10:02 PM, Matt Foster <[EMAIL PROTECTED]>
> wrote:
> OK...I found RasterSymbolizerHelper (and some helpful example code on the GT
> website!), and I'm getting a color GeoTiff now. However, it appears that
> the opacity information from my SLD does not get applied to the GeoTiff.
> The entire image has an opacity of 1.0, but I have part of the color map
> with opacity 0.
> The RasterSymbolizer does not handle himself the opacity for the
> output coverage but it leaves that to the GridCoveageRenderer in order
> to prevent the creation of an intermediate image.
> I am realizing that it would probably be better to control this
> behaviour throuh a Hint so that we can use the RasterSymbolizer more
> in a standalone way.
> However, from your words it seems that your problem is related to
> applying a colormap with transparency not to the transparency of the
> whole image. Am I right?
> You are correct. I am assigning a color of black with an opacity of 0 to
> the areas in the data where there is nothing useful to see. This works
> perfectly when I create a PNG image via GridCoverageRenderer, but not in the
> Geotiff. I've made use of some code from this page; in particular the
> section "Symbolizing Sea Bottom Data". The Geotiff gets the color ramps
> nicely, but the opacity seems to just get ignored.
> Also, it appears that the CRS that I have applied to the
> GridCoverage (WGS84) does not make it into the GeoTiff correctly. I have
> checked it with both gdalinfo and ArcMap, and neither indicate that the
> GeoTiff is WGS84.
> I definitely need an isolated test case to check what you are trying
> to do and to see if you ran into a bug.
> I can provide an ftp address where you can also put some test data.
> Is that feasible?
> That might be a challenge. The data I'm starting with is very non-standard
> NetCDF. I pull the raw float values out using the NetCDF-java package and
> create my GridCoverage2D object using the float[][] array. I'm thinking the
> only way to do this might be to provide both the data and my code, which
> might be embarrassing to me, but I'm willing to try anything you think might
> help.
> I can tell you that I've retrieved the CoordinateReferenceSystem object from
> my GridCoverage, and toWKT() indicates that the CRS is set correctly on the
> GridCoverage.
> Matt
> Simone.
> Have a good weekend!
> Matt
> Matt Foster wrote:
> Hello Simone,
> I think I see how to do that using
> RasterSymbolizerSupport.recolorCoverage(), however, RasterSymbolizerSupport
> seems to be missing in 2.5M2. It's in the online javadoc, but it is neither
> in my 2.5M2 jars, nor in the 2.5M2 javadoc I downloaded. Do you know why
> this is? Should I be using something besides RasterSymbolizerSupport?
> Matt
> Simone Giannecchini wrote:
> Ciao Matt,
> steps below...
> -apply the rastersymb (you should be able to do so :-) )
> -create a geotiff writer for a file
> -do a write supplying your grdicoverage to the geotiff writer.
> Simone.-
> On Fri, May 16, 2008 at 2:56 PM, Matt Foster <[EMAIL PROTECTED]>
> wrote:
> If I have a GridCoverage2D and a RasterSymbolizer (with ColorMap) is there
> an easy way I can get a color GeoTIFF? I'm using 2.5M2.
> Thanks for any input.
> Matt
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--
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President /CEO GeoSolutions S.A.S.
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