Re: [Geotools-gt2-users] Raster and Interpolation...

[Martin D. <mar...@no...>]

Fernando Avalos Garc=EDa a =E9crit :
> I understand that I can create a CoverageGrid, and I
> can map the values to cells on the grid and can i to
> make the interpolation???

Once a GridCoverage2D has been created, you can write:

coverage =3D Operations.interpolate(coverage, "Bicubic");

where "Bicubic" can also be "Bicubic2" (see Java Advanced Imaging=20
documentation for the difference between "Bicubic" and "Bicubic2") or=20
"Bilinear".

The returned coverage is identical to the original one, except that all=20
call to "evaluate" method will performs a bicubic interpolation. Example:

double[] values =3D null;
for (... do some loop ...) {
     DirectPosition position =3D ...;
     values =3D coverage.evaluate(position, values);
}

Where 'position' is in terms of the coverage CRS (usually geographic=20
coordinates or coordinates in some map projections; not pixel coordinates=
).

	Martin.