Unfortunately it does not work
I tried:
RenderedImage rImg = cov.getRenderedImage();
TiledImage tImg = new TiledImage(rImg, true);
float c = (float)100;
for (int numXtiles=0; numXtiles<tImg .getNumXTiles(); numXtiles++){
for (int numYtiles=0; numYtiles<tImg .getNumYTiles(); numYtiles++){
WritableRaster wr = tImg.getWritableTile(numXtiles, numYtiles);
for (int yy=0; yy<wr.getHeight(); yy++){
for (int xx=0; xx<wr.getWidth(); xx++){
wr.setSample(wr.getMinX()+xx, wr.getMinY()+yy,
0, c);
}
}
tImg.releaseWritableTile(numXtiles, numYtiles);
}
}
On the loop 1880 program is terminated with the following error:
"Exception in thread "main" java.lang.RuntimeException: Cannot construct
DataBuffer."
Michael Bedward wrote:
>
> try this...
>
> RenderedImage rImg = cov.getRenderedImage();
> TiledImage tImg = new TiledImage(rImg, true);
>
> then work with the TiledImage which, in effect, is a writable view of
> your coverage's raster
>
> Caveat: I haven't done this with really large coverages.
>
> Let us know how you go.
>
> Michael
>
> 2008/9/27 Oleg72 <[EMAIL PROTECTED]>:
>>
>> Dear All,
>> I am trying to read and edit large ESRI Ascii Grid.
>> To edit small grids the following works fine:
>> (WritableRaster)RenderedImage().getData();
>>
>> Unfortunately this approach does not work with large Grids.
>> * Is there a way to make GridCoverage2D created from large ascii Grid
>> editable?
>>
>> At the moment the only way to solve this problem is to create new
>> GridCoverage2D using GridCoverageBuilder and copy data (floating) into
>> it.
>> The only problem at the moment is to define number of digits after
>> decimal
>> point.
>> If I am writing value 0.001 and reading it back I am getting 0.0 same
>> problem with saving grid to file.
>> * How do I define the number of decimal places for values stored in
>> GridCoverage2D?
>> Any help would be highly appreciated.
>> Oleg
>> --
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>>
>>
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