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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I have two layers of polygons<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I want to make holes in the first layer using the second layer as mask.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I can do this by function ‘Difference’ – but the result is a third layer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I would like the holes in the polygons to be in the first (existing) layer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Any suggestions
</span><span lang="EN-US" style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Lene Fischer</span></b><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray;mso-fareast-language:EN-US"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Associate Professor</span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">University of Copenhagen</span></b><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray;mso-fareast-language:EN-US"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Department of Geoscience and Natural Resource Management<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Forest and Landscape College<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Nødebovej 77a<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">3480 Fredensborg<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Denmark<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">DIR +45 35331579<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">MOB +45 40115084<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><a href="mailto:lfi@ign.ku.dk" title="lfi@ign.ku.dk"><span lang="DA" style="color:gray">lfi@ign.ku.dk</span></a></span><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><a href="http://www.ign.ku.dk/" title="www.ign.ku.dk"><span lang="DA" style="color:gray">www.ign.ku.dk</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-US" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><img border="0" width="213" height="81" id="Billede_x0020_2" src="cid:image001.jpg@01D285D5.94DFD130" alt="cid:image001.gif@01D2444C.0C2DB110"></span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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