Thanks Hamish for your help,<br><br>that was helpful. But now, when I use <strong>v.line.center,</strong> I get the following error:<br><br>WARNING: Cannot get point on line: cat=927 offset=89379.795093 (line lenght=2.219076)<br>
P 927 927 89379.795093<br><br>I guess the reason for this error is the projection (mapset?) unit. The projection unit(s) in my mapset is degree(s). And the length units are meters.<br> <br>So, how can i change the mapset units. Should I create another mapset with the properly units?<br>
<br>regards<br><br>Manuel<br><br><br><br><br><br><br><div><span class="gmail_quote">2008/6/5, Hamish <<a href="mailto:hamish_b@yahoo.com">hamish_b@yahoo.com</a>>:</span><blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex">
Manuel Sangiao wrote:<br> > in order to use *v.line.center* properly I use* v.category*<br> > to adjust category assignment.<br> ><br> > As a result I get:<br> ><br> > GRASS 6.2.2 (admeurop):> v.category in=bound1 layer=2 out=boundary1 --o<br>
<br>....<br><br>> Number of lines : 0<br> > Number of boundaries: 592<br><br>....<br><br>> Then I use *v.line.center* to get the middle points of the<br> > boundaries (That's right?). Then I get the following result:<br>
<br>....<br> > 0 records updated/inserted<br> ....<br><br>> So, I get nothing<br> ><br> > Any can me help? I don't understand this result.<br><br><br><br>use v.type to convert boundaries to lines first.<br>
<br><br><br> Hamish<br><br><br><br><br><br></blockquote></div><br>