I think you may of answered your own question? The image provided by uDig is a rendered image; it may of been processed a bit prior to you getting it. As an example the values may represent a measurement; rather than simply RGB values...
We may need to take your example to the geoTools list; do you mind trying with the GeoTools GeoTIFF reader and seeing what you get? Jody 2009/2/17 Pasquale Paola <[email protected]> > and I obtain the correct values for example 4.0 > > When I change the raster image read on filesystem, with the rendered image > obtained by udig raster layer, I obtain different values. For example in the > pixel with value 4.0 I found 1.512366E38. > Where is the problem? > How can I solve it? > > Cheers > Pasquale Paola > > * > .................................................................................................... > Pasquale Paola > Engineering Ingegneria Informatica S.p.a.* > *Direzione: Ricerca ed Innovazione** > Via Terragneta, 90 > 80058 Torre Annunziata (NA) > Tel. +39.081.862.68.21** > Fax +39.081.862.68.19 > e-mail:[email protected] > http://www.linkedin.com/in/pasqualepaola * > > > _______________________________________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/mailman/listinfo/udig-devel > >
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