What methods are there for comparing two maps for
simularity? I am interested in the correlation and not
interested what the relationship is (slope,intercept). I've
used r.covar but was wondering what other methods others have
used to compare two maps.
Of course this depends on what type of maps you are comparing,
but i.texture may give useful information.
from the manual page:
man> i.texture - calculate textural features on a raster file
man>
man> Features include:
man> (1) Angular Second Moment, (2) Contrast,
man> (3) Correlation, (4) Variance,
man> (5) Inverse Difference Moment, (6) Sum Average,
man> (7) Sum Variance, (8) Sum Entropy,
man> (9) Entropy, (10) Difference Variance,
man> (11) Difference Entropy,
man> (12, 13) Information Measures of Correlation, and
man> (14) Maximal Correlation Coefficient.
i.texture should be in the incoming directory on moon and is also available
at pasture.ecn.purdue.edu:/pub/mccauley/grass/i.texture.shar.Z
--Darrell