[GRASS-user] More QUESTIONS !?

[Nikos Alexandris]

> 3. Is there a link (image to image) utility so one can
> compare pixel-by-pixel 2 images of the region but with a
> different date of acquisition? I try with i.spectral but I
> don't know how to load an image to the monitor which is
> selected to choose a location. Any ideas?

>>The map calculator (r.mapcalc) is perfect for this. Create a difference
map.

>>r.mapcalc 'diffmap=map1 - map2'

>>(or pick map calculator from the raster menu)

>>Then apply the difference color table to the map, using r.colors
(raster->manage map colors->color tables)


About this link "tool"... I think my description was not clear enough! I
mean something like the link tool in ERDAS Imagine or in ENVI! Wouldn't it
be useful?

BTW: Thanks to all for the replies. It really gives a good feeling to
beginners to stick-on

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