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[Backport branch-8-4] Add PROCESSING CLASSIFY_SCALED directive #1043

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jmckenna merged 1 commit into from
Oct 6, 2025
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[Backport branch-8-4] Add PROCESSING CLASSIFY_SCALED directive #1043

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19 changes: 18 additions & 1 deletion en/input/raster.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -420,7 +420,24 @@ are supported in MapServer 4.0 and newer.
::

PROCESSING "BANDS=4,2,1"


.. index::
triple: LAYER; PROCESSING; CLASSIFY_SCALED

**CLASSIFY_SCALED=YES/NO**
This directive (added in 7.6) allows classification to use pre-scaled raster data
for 16 bit rasters. In the example below data in the range 0-28
is stretched to the 0-255 range and then classified.

Example:

::

PROCESSING "SCALE=0,28"
PROCESSING "SCALE_BUCKETS=256"
PROCESSING "CLASSIFY_SCALED=TRUE"


.. index::
triple: LAYER; PROCESSING; COLOR_MATCH_THRESHOLD

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