Markus Neteler wrote: > > > I think that the strange i.fft file format is an obstacle here. AFAIK it > > > is not saved as "normal" raster file which limits the possibilities to > > > elaborate. Maybe I am wrong, don't quite remember well.. > > > > No, you're quite correct. > > > > i.ifft ignores the actual input map, reading the data from the fftreal > > and fftimag files created by i.ifft. So you can't modify the i.fft > > output with e.g. r.mapcalc than use i.ifft on the result. The only > > modification which can be performed on the FFT data is masking; i.ifft > > reads the mask separately and applies it to the data. > > Could we change this for GRASS 7? Possibly there was a reason > to implement it as private solution but hopefullyx we can work around > that.
The main issue is that you can't store both the real and imaginary components (or, alternatively, magnitude and phase) in a single map. The other issues (e.g. the fact that an array of FFT coefficients isn't actually geodata) can probably be fudged around. -- Glynn Clements <[EMAIL PROTECTED]> _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
