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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I have the following problem: I have in grass 6.4.1 two polygon-vector layers (div_14 and nutzungsz).The result should be the area oft the layer div_14 not covered by the
areas of the layer nutzungsz. So what i did was: <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">v.overlay -t ainput=div_14 atype=area alayer=1 binput=nutzungsz btype=area blayer=1 output=div_15 operator=not –overwrite<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Now in the layer I get (div_15), i miss a large area which is NOT covered by the layer nutzungsz. So there is something wrong.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">You can get the data i used ether as grass location (http://</span><span lang="FR-CH">
</span><span lang="FR-CH" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><a href="http://asmaron.homelinux.net/grass/problem.zip">http://asmaron.homelinux.net/grass/problem.zip</a>) or as shapes (<a href="http://asmaron.homelinux.net/grass/shp.zip">http://asmaron.homelinux.net/grass/shp.zip</a>
)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Is this a bug in the grass modul (v.overlay) or is it a bug in the data?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">My System:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">GRASS 6.4.1 (2011)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Linux 2.6.32-37-server (ubuntu)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Thanks a lot<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Martin<o:p></o:p></span></p>
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