Dear Giuseppe
First I have to apologize for the big delay I used to reply you.
Your hint was correct and the map is done.
Thank you very much again!
Spero di rivederti presto.
Giacomo
On 24/11/2014 00:20, Giuseppe Sucameli wrote:
Ciao Giacomo,
the condition ( "lc_n_italy1@1" >= 8 ) is evaluated to either 1 or 0
depending on the lc_n_italy1@1 value.
so you always get 0 (!) as the second factor is always 0.
Try to set the formula to the following:
( "lc_n_italy1@1" < 8 ) * "lc_n_italy1@1
Best regards.
Giuseppe
On Sat, Nov 22, 2014 at 11:34 AM, Giacomo Fontanelli
<[email protected] <mailto:[email protected]>>
wrote:
Dear community
I start from a raster layer, 8bit unsigned integer. Pixel value
ranges from 1 to 12.
I would like to mask the pixels with value>8, setting their new
value to 0.
I used raster calculator with this formula
( "lc_n_italy1@1" >= 8 ) * ("lc_n_italy1@1" * 0)
I tried also
( "lc_n_italy1@1" >= 8 ) * 0
but I always obtain a map with only "Nan"
Can you help me?
Thank you
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Giuseppe Sucameli
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