color palette on a Arc Info Binary Grid (ADF)

[Matthew Perry]

Raghu,

  I've classified ArcInfo GRIDs using CLASS
expressions based on the pixel value. Here's a mapfile
sample:

LAYER
  NAME "wildlife_habitat"
  STATUS OFF
  TYPE RASTER
  # Folder containing the hdr.adf
  DATA "kb_veg_grid/kbshr_v10a/"
  CLASSITEM "[pixel]"
  CLASS
    NAME "Mixed Conifer"
    EXPRESSION ([pixel] < 48 OR [pixel] == 159)
    COLOR  0 123 27
  END
  CLASS
    NAME "Conifer/Hardwood"
    EXPRESSION ([pixel] >= 48 AND [pixel] < 81)
    COLOR 78 221 0
  END
  ....
  ....
END

Hope this helps. I did this manually which was
time-consuming given that I had 35+ classes.

There *might* be a way to convert your color table
(.clr) to classes or have gdal use the .clr
directly.... but I will defer to the rest of the list
on that one.

Good luck,

Matt Perry
Humboldt State University


--- "Shantha, Raghavendra Vasanth" <raghu at KU.EDU>
wrote:
> Hi,
>
> I was looking for a way to apply different color
> palettes (say shades of
> red, green etc) to a gray scale Arc Info Binary Grid
> (ADF) Raster file
> using mapserver.
>
> Any ideas as to how I can do this?
>
>
> Thanks,
> Raghu
>