[MS4W-Users] MS4W and Rendering MrSID Images in 24-bit Format

[Scott Samson]

There was a thread last month addressing MSW4 and the rendering of 24-bit MrSID images.  I applied the suggestion of incorporating "IMAGETYPE PNG24" but an 8-bit color image was produced.  If I use "PROCESS DITHER=YES" I get a 24-bit image returned but with artifacts associated with dithering.  Below is the Mapfile.
================================================================
MAP

    NAME 'airphoto2009'
    SIZE 800 650
    STATUS ON
    EXTENT  661790.000000 3707789.000000 720769.000000 3778864.000000

    UNITS METERS

    INCLUDE "../geomoose_globals.map"

      PROJECTION
        'init=epsg:26915'
    END

    LAYER
            NAME airphoto2009
            DATA './AerialImage2009.sid'
            STATUS ON
            TYPE RASTER
     END
  
END 
=============================================================
Any suggestions are greatly appreciated.

Thanks!



 Scott A. Samson, Ph.D., GISP, CMS
Extension Professor and Geospatial Extension Specialist
Geosystems Research Institute
Mississippi State University
HPCC 227 / Mail Stop 9652
Mississippi State, MS 39762-9652
Tel:  662-325-9491


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