Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL|Language|Variables">Variables</a><hr>
<H5>Layer Variables</H5>
Layer variables are identified by the leading character `%'. Layer
variables take on the grey level value of the pixel being processed
for a particular layer (image channel). For example, %3 would take
on the grey level value of the third image channel at the current
pixel position. If a name is used (e.g., %tree), then the
association between the name and an explicit layer is made when the
model is first run using a SET or INPUT statement.
<P>
<PRE>
 Syntax:    %x, %n

 Examples:  %soil,%z,%1,%23
</PRE>
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Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL|Language|Variables">Variables</a><br>
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