Ciao Cesar,
you ran into a limitation of how images are handle in java. Long story
short width*height cannot be larger than the maximum positive Integer.
However I found a workaround a while ago, I am not sure I ever applied
it to the ascii arcgrid reader.
Which version of geotools are you working with.

Ciao,
Simone.
-------------------------------------------------------
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GeoSolutions S.A.S.
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2009/10/2 César Martínez Izquierdo <[email protected]>:
> I need to process huge rasters with GeoTools, but it seems I've found
> its limit :-(
>
> INFO: Unable to find crs, continuing with default WGS4 CRS
> Exception in thread "main" java.lang.IllegalArgumentException:
> Dimensions (width=59000 height=46000) are too large
>        at java.awt.image.SampleModel.<init>(SampleModel.java:112)
>        at 
> java.awt.image.ComponentSampleModel.<init>(ComponentSampleModel.java:128)
>        at 
> javax.media.jai.ComponentSampleModelJAI.<init>(ComponentSampleModelJAI.java:73)
>        at 
> javax.media.jai.FloatDoubleColorModel.createCompatibleSampleModel(FloatDoubleColorModel.java:1003)
>        at 
> it.geosolutions.imageio.plugins.arcgrid.AsciiGridsImageReader.initializeReader(AsciiGridsImageReader.java:344)
>        at 
> it.geosolutions.imageio.plugins.arcgrid.AsciiGridsImageReader.setInput(AsciiGridsImageReader.java:320)
>        at 
> org.geotools.gce.arcgrid.ArcGridReader.<init>(ArcGridReader.java:184)
>        at 
> org.geotools.gce.arcgrid.ArcGridFormat.getReader(ArcGridFormat.java:157)
>        at 
> org.geotools.gce.arcgrid.ArcGridFormat.getReader(ArcGridFormat.java:106)
>        at etclusi.tests.gt.TestArcGrid.main(TestArcGrid.java:24)
>
>
> The relevant code follows:
>
>                File file = new File("d:\\bigtab\\mosaic.asc");
>                ArcGridFormat agf = new ArcGridFormat();
>                GridCoverageReader reader = agf.getReader(file);
>
> Have you found a similar problem? Is there any workaround?
> I see it is a problem with JAI... is there any chance to replace the
> "limited" classes with another non-JAIs classes?
>
> Regards,
>
> César Martínez Izquierdo
>
> --
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>   César Martínez Izquierdo
>   GIS developer
>   -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
>   ETC-LUSI: http://etc-lusi.eionet.europa.eu/
>   Universitat Autònoma de Barcelona (SPAIN)
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
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