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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks Nicolas,<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;mso-fareast-language:EN-US">I’ve added a boolean column (outer_pg) in my original layer (org).<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;mso-fareast-language:EN-US">Then I tried to populate that column, but it I don’t have the skills…
<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;mso-fareast-language:EN-US">I tried to use your selection:<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;mso-fareast-language:EN-US"><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;mso-fareast-language:EN-US">SELECT DISTINCT p1.fid, p2.fid IS null AS "outer_pg"<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;mso-fareast-language:EN-US">FROM org p1<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;mso-fareast-language:EN-US"> LEFT JOIN org p2 ON p1.fid <> p2.fid AND st_within(p1.the_geom, p2.the_geom)<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;mso-fareast-language:EN-US">order by p1.fid;<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;mso-fareast-language:EN-US"><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;mso-fareast-language:EN-US">My try to populate outer_pg:<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;mso-fareast-language:EN-US">UPDATE org
<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;mso-fareast-language:EN-US">SET "outer_pg" = (SELECT outer_p FROM (<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;mso-fareast-language:EN-US">SELECT DISTINCT p1.fid, p2.fid IS null AS outer_p<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;mso-fareast-language:EN-US">from org p1<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;mso-fareast-language:EN-US"> LEFT JOIN org p2 ON p1.fid <> p2.fid AND st_within(p1.the_geom, p2.the_geom) WHERE p1.fid = org.fid) AS tmp)<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;mso-fareast-language:EN-US"><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;mso-fareast-language:EN-US">But that is not correct, do you have any suggestions?<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;mso-fareast-language:EN-US">Kind 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;mso-fareast-language:EN-US">Paul<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;mso-fareast-language:EN-US"><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;mso-fareast-language:EN-US">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Från:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> postgis-users <postgis-users-bounces@lists.osgeo.org>
<b>För </b>Nicolas Ribot<br>
<b>Skickat:</b> den 30 november 2021 19:17<br>
<b>Till:</b> PostGIS Users Discussion <postgis-users@lists.osgeo.org><br>
<b>Ämne:</b> Re: [postgis-users] polygons inside polygon<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p><strong><span style="background:yellow">Klicka bara på länkar och öppna bilagor om du litar på avsändaren och vet att innehållet är säkert.</span></strong><o:p></o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">What about a simple left join on the table searching for polygons contained inside other polygon ?<o:p></o:p></p>
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<p class="MsoNormal">Polygons that are contained inside other polygons will have false for the outer_pg column and true if they are not contained (ie are outer polygons).<o:p></o:p></p>
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<p class="MsoNormal">You can then create the tables you want based on the outer_pg values<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<pre style="margin-bottom:12.0pt;background:#2B2B2B"><span style="font-family:Consolas;color:#CC7832">select distinct p1.</span><span style="font-family:Consolas;color:#9876AA">id</span><span style="font-family:Consolas;color:#CC7832">, p2.</span><span style="font-family:Consolas;color:#9876AA">id </span><span style="font-family:Consolas;color:#CC7832">is null as outer_pg<br>from polygon p1<br> left join polygon p2 on p1.</span><span style="font-family:Consolas;color:#9876AA">id </span><span style="font-family:Consolas;color:#CC7832"><> p2.</span><span style="font-family:Consolas;color:#9876AA">id </span><span style="font-family:Consolas;color:#CC7832">and </span><i><span style="font-family:Consolas;color:#FFC66D">st_within</span></i><span style="font-family:Consolas;color:#CC7832">(p1.</span><span style="font-family:Consolas;color:#9876AA">geom</span><span style="font-family:Consolas;color:#CC7832">, p2.</span><span style="font-family:Consolas;color:#9876AA">geom</span><span style="font-family:Consolas;color:#CC7832">)<br>order by p1.</span><span style="font-family:Consolas;color:#9876AA">id</span><span style="font-family:Consolas;color:#CC7832">;<br><br>id outer_pg<br>1 true<br>2 true<br>3 true<br>4 true<br>5 false<br>6 false<br>7 false<br>8 true<br>9 true<br>10 true<br>11 false<br><br></span><span style="font-family:Consolas;color:#A9B7C6"><o:p></o:p></span></pre>
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<p class="MsoNormal">Nicolas<o:p></o:p></p>
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