Hi -
I am running texture analyses on individual Landsat bands using r.texture (using the contrast measure). In order to produce a directionally invariant texture image, I am taking the average of the four ouput rasters, using r.mapcalc.
When I export the final result to a tiff image using r.out.tiff, I get a 3 band image, and I'm not sure why. I have only been using the first band for further analyses, but want to be sure of what I am leaving out. Does r.out.tiff always create a multiband output image? Or is it related to the r.texture output?
Thanks for any help on this!
Murray Richardson
I am running texture analyses on individual Landsat bands using
r.texture (using the contrast measure). In order to produce a
directionally invariant texture image, I am taking the average of the
four ouput rasters, using r.mapcalc.
When I export the final result to a tiff image using r.out.tiff, I get a
3 band image, and I'm not sure why. I have only been using the first
band for further analyses, but want to be sure of what I am leaving
out.
Does r.out.tiff always create a multiband output image? Or is it
related to the r.texture output?
if you provide -p for r.out.tiff you'll get a 8bit scale output
watch for the floating point values, r.out.tiff -p doesn't actually round
the values in spite of what it says
it doesn't even trunctate properly, I don't know, someone please verify this
it's best to round the values yourself with mapcalc prior to export into
tiff
Maciek