Landsat 8 16-bit to 8-bit (Value domain to Image?)

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Landsat 8 16-bit to 8-bit (Value domain to Image?)

water
Dear friends,
I study ILWIS for my scientific activates and passed through your
lessons (ilwis_3_0_User_guide.pdf) 1-6  now, and did not met problems
with excesses based on your data. But, in your examples all SPOT’s and
Landsat (Tmb1-7) raster maps have Image domain with 0-255 rage. I did
not find in your guide (and in Internet too) how to convert Landsat  8
16-bit data at 8-bit Image format to repeat your lessons with real
Landsat 8  .TIF  format maps.
After Import -> Map (ILWIS 3.3) procedure I have Value domain for
imported image raged 0-32765.
Can you explain, please, how to receive 8-bit image?
Sincerely yours,
                        Victor Popovych

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Re: Landsat 8 16-bit to 8-bit (Value domain to Image?)

schouwenburg
Apart from some, a bit cryptic , manipulation of the value range in the property form the simplest way is to simply divide the import result (16 bit) by 255 and forcing it to domain image

myoutput{dom=image} = inputmap / 255

Martin Schouwenburg
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-----Original Message-----
From: Ilwis [mailto:[hidden email]] On Behalf Of water
Sent: donderdag 22 oktober 2015 13:32
To: [hidden email]
Subject: [Ilwis] Landsat 8 16-bit to 8-bit (Value domain to Image?)

Dear friends,
I study ILWIS for my scientific activates and passed through your lessons (ilwis_3_0_User_guide.pdf) 1-6  now, and did not met problems with excesses based on your data. But, in your examples all SPOT’s and Landsat (Tmb1-7) raster maps have Image domain with 0-255 rage. I did not find in your guide (and in Internet too) how to convert Landsat  8 16-bit data at 8-bit Image format to repeat your lessons with real Landsat 8  .TIF  format maps.
After Import -> Map (ILWIS 3.3) procedure I have Value domain for imported image raged 0-32765.
Can you explain, please, how to receive 8-bit image?
Sincerely yours,
                        Victor Popovych

_______________________________________________
Ilwis mailing list
[hidden email]
http://list.52north.org/mailman/listinfo/ilwis
http://ilwis.forum.52north.org
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http://52north.org/resources/mailing-lists-and-forums/guidelines
_______________________________________________
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http://ilwis.forum.52north.org
Please respect our mailing list guidelines:
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