Hi Brian-
Sorry for the delay in responding.  I was on vacation and your
message got lost in my mailbox.
Brian Blanton wrote:
Hi.  I'm new IDV user.
Welcome.
I'm using IDV for visualization of ocean
model output that has been mapped to a
regular grid.  The points over land are set
to _FillValue=nf90_fill_value, but contours get
drawn with a max value on the range of
nf90_fill_value.
What does the attribute look like in ncdump?  Is it
    var:__FillValue = "nf90_fill_value" ;
or has the macro been expanded (as it should be).
It will only work if the value is numeric.
Does IDV recognize netCDF FillValues?
It should.  Can you provide me with a sample file?
Don
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
        "Time makes everyone interesting, even YOU!"
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