Extra Parameters in WMS Layer

[Jeffrey Johnson]

Hi all,

I am retrieving some meteorological data from a WMS server at NASA.

See the sample URLs below.

http://map06.gsfc.nasa.gov/cgi-bin/geos-wms.cgi?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=wind&SRS=EPSG:4326&BBOX=-180,-90,180,90&WIDTH=1000&HEIGHT=500&FORMAT=image/png&TIME=2006-10-12T00:00&dim_mbar=1000
http://map06.gsfc.nasa.gov/cgi-bin/geos-wms.cgi?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=wind&SRS=EPSG:4326&BBOX=-180,-90,180,90&WIDTH=1000&HEIGHT=500&FORMAT=image/png&TIME=2006-10-12T00:00&dim_mbar=900

Notice the last parameter dim_mbar=1000/dim_mbar_900 this allows the
height or pressure level to be specified. How do I pass this info to
the WMS using a mapserver mapfile? I can't seem to be able to specify
it in the metadata section of the WMS layer. So, by default the server
returns the 1000mb pressure level.

Any ideas, or pointers to documentation on this sort of thing?

Thanks in advance,

Jeff