[ms4w-users] WMS format question

[Smith, Michael]

Greetings,

I am a newbie to MapServer and WMS, but an old ESRI hand.  I have
MapServer (MS4W) running with ka-Map on a Windows XP PC.  I have created
a simple MapServer .map file which works fine in ka-Map.  Since it is
based on raster data (MrSID file which is 24-bit NAIP 2007 orthophoto
mosaic), I set the output format to JPEG.  This works fine in ka-Map and
looks the way I want it.  However, when I add this WMS to ArcMap, it
appears to make 8-bit files.

I can see in my temp folders that indeed, the ka-Map output is JPEG like
I want, but the ArcMap output is PNG.  The JPEGs are nice 24-bit images
and the PNGs 8-bit garbage.

Any suggestions?  My .map file is below.  Looking at web resources, it
seems like I need a "wms_format" "img/jpeg" somewhere, but after many
permutations of those parameters in my map file, I still can't seem to
get jpegs in ArcGIS, only PNGs.


***********
Michael Smith
Maine DEP/OIT 

#
# Start of GMAP map file
#
#
NAME GMAP_DEMO
STATUS ON
SIZE 400 300
SYMBOLSET ../etc/symbols.sym
EXTENT 413000 4837000 446000 4894000
UNITS METERS
SHAPEPATH "../medata"
IMAGECOLOR 255 255 255
FONTSET ../etc/fonts.txt

OUTPUTFORMAT
  NAME jpeg
  DRIVER "GD/JPEG"
  IMAGEMODE RGB
  EXTENSION "jpeg"
  FORMATOPTION "QUALITY=75,PROGRESSIVE=TRUE"
END

#
# Start of web interface definition
#
WEB
#  Scales commented out for WMS
#  MINSCALE 5000
#  MAXSCALE 350000
#
# On Windows systems, /tmp and /tmp/ms_tmp/ should be created at the
root 
# of the drive where the .MAP file resides.
#
  IMAGEPATH "/ms4w/tmp/ms_tmp/" 
  IMAGEURL "/ms_tmp/"
# For WMS
  METADATA
    "wms_title" "wms_demo"
	"wms_onlineresource"
"http://csu-eia1pcgis2.som.w2k.state.me.us/cgi-bin/mapserv.exe?map=c:/ms
4w/apps/gmap/htdocs/gmap75.map&"
	"wms_srs" "EPSG:26919"
  END
END

#
# Projection - required for WMS
#
PROJECTION
  "init=epsg:26919"
END

#
# Start of reference map
#
REFERENCE
   IMAGE meimages/keymap.png
   EXTENT 413000 4837000 446000 4894000
   STATUS ON
  COLOR -1 -1 -1
  OUTLINECOLOR 255 0 0
  SIZE 116 116
END

#
# Start of legend
#
LEGEND
  KEYSIZE 18 12
  LABEL
    TYPE BITMAP
    SIZE MEDIUM
    COLOR 0 0 89
  END
  STATUS ON
END

#
# Start of scalebar
#
SCALEBAR
  IMAGECOLOR 255 255 255
  LABEL
    COLOR 0 0 0 
    SIZE SMALL
  END
  SIZE 150 5
  COLOR 255 255 255
  BACKGROUNDCOLOR 0 0 0
  OUTLINECOLOR 0 0 0
  UNITS kilometers
  INTERVALS 5
  STATUS ON
END


QUERYMAP
  STYLE HILITE
  COLOR 255 0 0
END


#
# Start of layer definitions
#


LAYER
  NAME naip2007
  METADATA
    "wms_title" "NAIP 2007"
  END
  TYPE RASTER
  STATUS ON
  DATA sagadahoc.sid
  PROJECTION
    "init=epsg:26919"
  END
END

END # Map File