<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Hello PostGIS devs,</div><div><br></div><div>It seems that "postgis_topology" extension does not support topology-network approach.</div><div>Here are my sources:</div><div><ol><li>What is topology-network: <a href="https://www.gaia-gis.it/fossil/libspatialite/wiki?name=topo-intro">https://www.gaia-gis.it/fossil/libspatialite/wiki?name=topo-intro</a></li><li>Source no1 indicating that Postgis does not support topology-network approach: <a href="https://gis.stackexchange.com/questions/122636/prevent-postgis-topology-from-splitting-edges-on-line-insert">https://gis.stackexchange.com/questions/122636/prevent-postgis-topology-from-splitting-edges-on-line-insert</a></li><li>Source no2 indicating that Postgis does not support topology-network approach: <a href="https://terragis.net/docs/other/MASTERING_POSTGIS.pdf">https://terragis.net/docs/other/MASTERING_POSTGIS.pdf</a> => p253</li></ol></div></div></div></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><div>"Before we start working with topology, we need to discuss the key concepts behind the
PostGIS topological data model. PostGIS topology implementation is based on ISO standard
13249 - Information technology - Database languages - SQL multimedia and application packages -
Part 3: Spatial. The standard name is often abbreviated as ISO SQL/MM. This standard
defines two data models for topology: TopoGeometry and TopoNetwork; PostGIS
implements only the former."</div></div></div></div></div></blockquote></blockquote><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div></div></div></div></blockquote></blockquote><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>I could verify this by testing on a basic local setup with QGIS and <b>Postgis version 3.3</b>. </div><div>I guess this feature was not added since. </div><div><br></div><div>I did not found any issues regarding this missing feature.</div><div><br></div><div>Is an issue already openned to request this new feature or should I create one ?</div><div><br></div><div>Best regards,</div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature">Pierre HARDY<br></div></div></div></div></div></div></div></div>