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Topic: transformation

       i.fft                                                        Fast Fourier Transform (FFT) for image processing.

       i.ifft                                                       Inverse Fast Fourier Transform (IFFT) for image processing.

       i.pca                                                        Principal components analysis (PCA) for image processing.

       i.tasscap                                                    Performs Tasseled Cap (Kauth Thomas) transformation.

       m.transform                                                  Computes  a  coordinate  transformation based on the control
                                                                    points.

       v.transform                                                  Performs an affine transformation (shift, scale and  rotate)
                                                                    on vector map.

       See also the corresponding keyword transformation for additional references.

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.1 Reference Manual