[Chameleon] Shades of Colour

[Eric Bridger]

Yes, that is possible. You would need to add CLASSES to your map file
for each color you want and specify what color to use based on a
CLASSITEM.  Here is a sample layer for bathymetry polygons. Note: I have
darker blues for shallow depths, and lighter blues for deeper depths.
The shapefile has a column called GRIDCODE which has the depth.

LAYER
  NAME "bathy_poly"
  TYPE POLYGON
  STATUS ON
  DATA "gom_poly_UTM19"
  METADATA
    DESCRIPTION "Bathymetry Polygons"
  END
  CLASSITEM "GRIDCODE"
  CLASS
    NAME "0 to 30 meters"
    EXPRESSION "0"
    STYLE
      COLOR 175 192 220
    END
  END
  CLASS
    NAME "30 to 60 meters"
    EXPRESSION "-30"
    STYLE
      COLOR 195 212 230
    END
  END
 CLASS
    NAME "60 to 100 meters"
    EXPRESSION "-60"
    STYLE
      COLOR 214 240 255
      OUTLINECOLOR 175 192 220
    END
  END
  CLASS
    NAME "100 to 200 meters"
    EXPRESSION "-100"
    STYLE
      COLOR 246 246 246
      OUTLINECOLOR 232 231 229
    END
  END
END

On Tue, 2004-08-31 at 13:53, Robin Robin wrote:
> Hi
> 
> Does anyone know if it is possible to make the shade of colour change based 
> on the level of a variable?  For example, if you had a shp file with level 
> measurements for the ocean, the deeper levels could be a deeper blue while 
> the shallow waters would be light.
> 
> Thanks
> 
> Robin Brown