[mapserver-users] How to serve individual RAW binary Bands from WCS as floating point geotiff

[Peter Willis]

Hello,

I have been setting up a WCS map file for mapserver.

PROBLEM:

Problems arise when rasters are defined
as follows:

LAYER
   NAME SomeDataChannel120
   STATUS OFF
   DEBUG ON
   TYPE RASTER ### required
   PROCESSING "BANDS=120"
   METADATA
     "wcs_label"           "Data/stuff"
     "wcs_rangeset_name"   'bands'
     "wcs_rangeset_label"  "Stuff thats mapped"
     "ows_extent" '-135 55 -121 46'
     "wcs_resolution" '0.08333333333333332 -0.083333333333333332'
     "ows_srs" 'EPSG:4326'
     "wcs_srs" 'EPSG:4326'
     "wcs_formats" 'GEOTIFF_FLOAT,GEOTIFF_INT16'
     "wcs_nativeformat" 'ENVI'
#    "wcs_bandcount" '563'
     "wcs_rangeset_axes" 'bands'
   END
   DATA /data/stuff.img
   PROJECTION
     "init=epsg:4623"
   END
   DUMP TRUE ### required
END


I have  'wcs_bandcount'  commented out because mapserver
causes an internal error in the web server if I define the
band count.

I get floating point geotiff served with the following client request:
http://sparky.com/cgi-bin/wcs?REQUEST=GetCoverage&SERVICE=WCS&VERSION=1.0.0&COVERAGE=SomeDataChannel120&CRS=EPSG:4326&BBOX=-135,55,-121,46&WIDTH=432&HEIGHT=216&FORMAT=GEOTIFF_FLOAT&RangeSubset=contents:nearest[Band[120]]

..however, I always only get the first band from the img file....


QUESTIONS:

Is there a problem with this setup?

Do I need to define each band as a layer in the mapfile
or will mapserver WCS allow the client to request a single
channel?

Thanks for any enlightenment,

Peter