Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/ISOCLUS|PARAMETERS">PARAMETERS</a><hr>
<H4>BACKVAL</H4>
<PRE>
  Valid Values:   &lt;any integer, positive or negative&gt;
  Default:        &lt;none&gt;
</PRE>
Optionally specifies a background grey level value to be ignored
during classification. If this parameter is specified, pixels with
the background grey level value will be assigned class 0 (null
class).
<P>
<PRE>
 EASI&gt;BACKVAL=i
</PRE>
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Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/ISOCLUS|PARAMETERS">PARAMETERS</a><br>
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