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<FONT FACE="Skia, Verdana, Helvetica, Arial"><SPAN DEFANGED_STYLE='font-size:12.0px'>I was looking at adding a button to the GIS Manager that would use d.extend to let people zoom to the maximum extent of all displayed maps. I tested it to make sure it worked as described and discovered that it works fine with rasters. However, with the new GRASS 6 vector format, d.extend will either generate an error or produce a region with an extent of 0 in one dimension (E-W so far)<BR>
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Error example. I used the Spearfish data set. If I extract and display a subset of archsites (cat 2-6), then run d.extend, I get this error.<BR>
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GRASS 6.1.cvs (spearfish57):~ > d.extend<BR>
ERROR: <nsres=0.000000> ** invalid input **<BR>
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The region either won’t change to match the map extents or it will go to 0 in one dimension. I can’t consistently reproduce the error of actually setting the region to 0, but it has happened several times.<BR>
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I guess I won’t add that button yet, but perhaps someone could look into this.<BR>
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Thanks<BR>
Michael<BR>
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____________________<BR>
C. Michael Barton, Professor of Anthropology<BR>
School of Human Evolution and Social Change<BR>
PO Box 872402<BR>
Arizona State University<BR>
Tempe, AZ 85287-2402<BR>
USA<BR>
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Phone: 480-965-6262<BR>
Fax: 480-965-7671<BR>
www: <www.public.asu.edu/~cmbarton><BR>
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