On 02/03/12 15:56, Johannes Radinger wrote:
Just for my personal interest two questions: 1) What if I want to
replace the category "0" with NULL (not the values 0)
Category 0 = value 0.
Raster values in GRASS are called categorie values.
Or maybe I don't understand what you mean ?
2) What would be the correct module if I want to assign another
category than NULL to certain values? Is hat module r.category? And
how can that be used in pyhton (how are the rules supplied)? Eg.
assign all values greater than 0 to 1 all other values NULL.
If you have a integer values (CELL), then r.reclass.
If you have floating point values, generally r.recode is more
appropriate (or just multiply your floating point map by the appropriate
number to make it integer).
Moritz
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