<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, May 28, 2014 at 10:54 AM, Margherita Di Leo <span dir="ltr"><<a href="mailto:dileomargherita@gmail.com" target="_blank">dileomargherita@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>in nc dataset, running </div>
<div><br></div><div><div>g.region rast=elev_lid792_1m -p</div><div><br></div><div>r.watershed elevation=elev_lid792_1m \</div><div>accumulation=elev_lid792_1m.acc \</div>
<div>basin=elev_lid792_1m.basin \</div><div>stream=elev_lid792_1m.stream \</div><div>tci=elev_lid792_1m.tci \</div><div>threshold=1000 \</div><div>-m</div><div><br></div><div>r.mapcalc "neg = if(elev_lid792_1m.acc < 0, 1, null())"</div>
<div><br></div><div>the map of negatives (problematic areas) presents the pattern shown in the attached screen shot. To me it looks weird, usually i find problematic areas on the border of the map, because the water basin is cut and a part of it falls outside the region. In this case they cover most of the area, the central part included. Any insight?</div>
<div><br></div><div><br></div></div></div></blockquote><div>Here's the screen shot: <a href="http://tinypic.com/view.php?pic=33b3fba&s=8#.U4WwNnV515E">http://tinypic.com/view.php?pic=33b3fba&s=8#.U4WwNnV515E</a> </div>
<div><br></div><div>grass is 7.0.0svn (r60523)</div></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><span style="border-collapse:separate;font-family:'Times New Roman';border-spacing:0px;font-size:medium"><span style="font-family:arial;font-size:small"><div>
<font color="#666666">Best regards,<br><br>Dr. Margherita DI LEO </font></div><div><span style="color:rgb(102,102,102)">Scientific / technical project officer</span><br></div><div><font color="#666666"><br></font></div>
<div><font color="#666666">European Commission - DG JRC </font></div><div><font color="#666666">Institute for Environment and Sustainability (IES)</font></div><div><font color="#666666">Via Fermi, 2749</font></div><div><font color="#666666">I-21027 Ispra (VA) - Italy - TP 261</font></div>
<div><font color="#666666"> </font></div><div><font color="#666666">Tel. +39 0332 78 3600 </font></div><div><font color="#666666"><a href="mailto:margherita.di-leo@jrc.ec.europa.eu" target="_blank">margherita.di-leo@jrc.ec.europa.eu</a></font></div>
<div><font color="#666666"><br></font></div><div><font color="#666666">Disclaimer: The views expressed are purely those of the writer and may not in any circumstance be regarded as stating an official position of the European Commission.</font></div>
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