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<FONT FACE="Verdana, Helvetica, Arial"><SPAN DEFANGED_STYLE='font-size:12.0px'>IR17;ve just discovered that when the –n flag is set in d.his, it seems to treat 0’s as NULL, regardless of whether or not they have been defined as NULL (i.e., using r.nulls). I’m guessing that this is a holdover from much earlier versions of GRASS that lacked NULL support. If this is the case, it should probably be changed so that d.his actually respects true NULL values and treats 0’s as real values. <BR>
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This does not appear to be the case for d.rgb and the –o flag. It appears to respect true NULL values, not 0’s.<BR>
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Michael<BR>
__________________________________________<BR>
Michael Barton, Professor of Anthropology<BR>
School of Human Evolution and Social Change<BR>
Arizona State University<BR>
Tempe, AZ 85287-2402<BR>
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phone: 480-965-6213<BR>
fax: 480-965-7671<BR>
www: <a href="http://www.public.asu.edu/~cmbarton">http://www.public.asu.edu/~cmbarton</a> <BR>
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