[mapserver-users] Dem classification
leonidas
leonidas_liakos at yahoo.gr
Mon Apr 20 03:30:52 PDT 2009
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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