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What happenend to r.mask in Grass 6.0 & 6.1?
<p>I have an irregular study area boundary that I want to use as a mask,
but it seems that r.mask is not supported in Grass 6.0 & 6.1.
<p>If r.mask is not available, is it possible to use other r.* tools to
come up with a similar effect to r.mask.
<p>regards,
<p>Al
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