[mapserver-users] Dem classification

[leonidas]

How can I generate a colormap for my raster (geotiff) dem in a mapfile. I
have found a way but it's to difficult to generate so much classes and find
the appropriate colors one by one.
So my layer in mapfile look like this:
LAYER
  NAME DEM
  TYPE raster
  STATUS default
  
  
  DATA "E:\leonidas\dem.tif"
  
  PROCESSING "SCALE=-10,2000"
  PROCESSING "SCALE_BUCKETS=2000"
   
  
  
    PROJECTION
    'proj=tmerc'
    'lat_0=0'
    'lon_0=24'
    'k=0.9996'
    'x_0=500000'
    'y_0=0'
    'ellps=GRS80'
    'towgs84=-199.87,74.79,246.62,0,0,0,0'
    'units=m'
    'no_defs'
    ''
  END
  

CLASSITEM "[pixel]"

    CLASS NAME '-1,5 - -1 m'  EXPRESSION ( [pixel] >= -1.5 AND [pixel] < -1
)COLOR 26 117 132 END
    CLASS NAME '-1 - -0,5 m'  EXPRESSION ( [pixel] >= -1 AND [pixel] < -0.5
)COLOR 28 126 133 END
    CLASS NAME '-0,5 - 0 m'   EXPRESSION ( [pixel] >= -0.5 AND [pixel] < 0 )
COLOR 29 135 134 END
    CLASS NAME ' 0 -  0,5 m'  EXPRESSION ( [pixel] >= 0 AND [pixel] < 0.5 ) 
COLOR 31 144 135 END
    CLASS NAME ' 0,5 - 1 m'   EXPRESSION ( [pixel] >= 0.5 AND [pixel] < 1 ) 
COLOR 33 152 136 END
    CLASS NAME ' 1 - 1,5 m'   EXPRESSION ( [pixel] >= 1 AND [pixel] < 1.5 ) 
COLOR 35 158 137 END
    CLASS NAME ' 1,5 - 2 m'   EXPRESSION ( [pixel] >= 1.5 AND [pixel] < 2 ) 
COLOR 38 163 128 END
    CLASS NAME ' 2 - 2,5 m'   EXPRESSION ( [pixel] >= 2 AND [pixel] < 2.5 ) 
COLOR 44 170 116 END
    CLASS NAME ' 2,5 - 3 m'   EXPRESSION ( [pixel] >= 2.5 AND [pixel] < 3 ) 
COLOR 49 176 104 END
    CLASS NAME ' 3 - 3,5 m'   EXPRESSION ( [pixel] >= 3 AND [pixel] < 3.5 ) 
COLOR 54 183 92 END
    CLASS NAME ' 3,5 - 4 m'   EXPRESSION ( [pixel] >= 3.5 AND [pixel] < 4 ) 
COLOR 60 190 80 END
    CLASS NAME ' 4 - 4,5 m'   EXPRESSION ( [pixel] >= 4 AND [pixel] < 4.5 ) 
COLOR 66 196 68 END
    CLASS NAME ' 4,5 - 5 m'   EXPRESSION ( [pixel] >= 4.5 AND [pixel] < 5 ) 
COLOR 72 203 56 END
    CLASS NAME ' 5 - 6 m'     EXPRESSION ( [pixel] >= 5 AND [pixel] < 6 )   
COLOR 77 209 44 END
    CLASS NAME ' 6 - 7 m'     EXPRESSION ( [pixel] >= 6 AND [pixel] < 7 )   
COLOR 83 216 31 END
    CLASS NAME ' 7 - 8 m'     EXPRESSION ( [pixel] >= 7 AND [pixel] < 8 )   
COLOR 88 222 20 END
    CLASS NAME ' 8 - 9 m'     EXPRESSION ( [pixel] >= 8 AND [pixel] < 9 )   
COLOR 94 229 8 END
END # of layer grid1

I have to do that until 2000m height. Is there any other options to classify
my dem's colors?
Thank you, Leonidas
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