Spectral correlation mapper
The Spectral correlation mapper (SCM) is an extension of spectral angle mapper that better discriminate between positive and negative correlations. The algorithm uses the Pearsonian correlation coefficient to compute the correlation angle between the input layer and the chosen spectral targets.
Tip
A detailed explanation and motivation for SCM, with an application for crop mapping, can be found here.
Usage
The spectral correlation mapper dialog allows you to choose the
raster layer and bands
to use as input data, and vector and
spectra to use as targets. Choose a name
for the output layer and select Run SCM to create the output in the
raster list. The output layer will have one band per chosen target.
Note
Non-spectral input data will only allow vector targets.