Re: [Geotools-devel] Re: GIS raster data coloring

[Martin D. <mar...@te...>]

Martin Desruisseaux a =E9crit:
>> A convenience method may be more convenient to use than an operator ;-=
)

The convenience method was not convenient. I changed its semantic. The=20
new one is simplier and I hope definitive (unless I get comments for=20
change). Now it is:


SampleDimension sd =3D new SampleDimension("Elevation",
                                          null, null, null, null, null,
                                          0, 255, scale, offset, null);

Where [0..255] (the 255 is inclusive) is the range of integer sample
values to use for the indexed image (the one which is going to be
rendered later); 'scale' and 'offset' are some coefficients for mapping
the range [0..255] to floating point values:

      float =3D integer*scale + offset

If you don't know 'scale' and 'offset' in advance, try to put some
reasonable numbers. Those coefficients can be changed later.

For changing the 'scale' and 'offset' values:

      sd =3D sd.rescale(scale, offset);

Note that the 'geophysics(true)' step has been skiped (this is where the=20
change in 'rescale' method semantic lies).

	Martin.