<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 2 May 2022 at 13:39, Lars Aksel Opsahl <<a href="mailto:Lars.Opsahl@nibio.no">Lars.Opsahl@nibio.no</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div>>From: postgis-users <<a href="mailto:postgis-users-bounces@lists.osgeo.org" target="_blank">postgis-users-bounces@lists.osgeo.org</a>> on behalf of Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com" target="_blank">shishaozhong@gmail.com</a>></div>
<div>>Sent: Monday, May 2, 2022 12:22 PM</div>
<div>>To: PostGIS Users Discussion <<a href="mailto:postgis-users@lists.osgeo.org" target="_blank">postgis-users@lists.osgeo.org</a>></div>
<div>>Subject: [postgis-users] Is there a better way for Finding Gaps/Sliver Holes?</div>
<div>> </div>
<div>>This solution does not appear to be well explained.</div>
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<div>>Find Topology Error With PostGIS (<a href="http://khairu-aqsara.net" target="_blank">khairu-aqsara.net</a>)</div>
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<div>>Has anyone tested it?</div>
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<div>>Is there a better way for Finding Gaps/Sliver Holes?</div>
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<div>>Regards,</div>
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<div>>David</div>
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<div>Hi</div>
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<div>At <a href="https://github.com/larsop/find-overlap-and-gap" target="_blank">https://github.com/larsop/find-overlap-and-gap</a></div>
<div>we have code that checks for overlaps and gaps on simple feature polygons and creates a spatial tables with the results. We have used this code on tables with millions of rows.</div>
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<div>And yes we see gaps/overlap as polygons, lines and points .</div>
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<div>Lars</div>
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<a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a></blockquote><div><br></div><div><br></div><div>Hi, Lars,</div><div><br></div><div>This is a mixture of codes for parallel processing and finding overlaps and gaps.</div><div><br></div><div>At the moment, what I am looking for is the steps and codes just for finding overlaps and gaps, namely the computational logic and codes.</div><div><br></div><div>It is very hard to find these in all these codes.</div><div><br></div><div>Regards,</div><div><br></div><div>David </div></div></div>