[Intranet logo] Thanks Jeff, I'll ask on the GEOS mailing list for their validity check. However, what about the QGIS specific validity check? Any hint on what is done differently?
Jean-François Bourdon, ing.f. Analyste en télédétection Direction des inventaires forestiers Ministère des Forêts, de la Faune et des Parcs 5700, 4e Avenue Ouest, local A-108 Québec (Québec) G1H 6R1 Téléphone : 418 627-8669, poste 704304 jean-francois.bour...@mffp.gouv.qc.ca mffp.gouv.qc.ca -----Message d'origine----- De : QGIS-Developer <qgis-developer-boun...@lists.osgeo.org> De la part de Jeff McKenna via QGIS-Developer Envoyé : 4 juin 2022 06:34 À : qgis-developer@lists.osgeo.org Objet : Re: [QGIS-Developer] QGIS vs GEOS validity check Hi JF, Regarding GEOS, please consider asking for more details through the project's vibrant forum (subscribe at https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fmailman%2Flistinfo%2Fgeos-devel&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eOB3FPwleIHG1Fx%2BsmdQxEag8PdLpWVp7MEEwV5KG9E%3D&reserved=0 ), I know there was a big release made yesterday and some chatter (project home: https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flibgeos.org%2F&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=sfLgVSdaKdsEHhUaiLgmGi6m0%2BJq6%2FJ2Vev2MtQDXA4%3D&reserved=0 ) GEOS is one of those core libraries, who would greatly appreciate your direct feedback. PS. hello from the east coast Thanks, -jeff -- Jeff McKenna GatewayGeo: Developers of MS4W, MapServer Consulting and Training co-founder of FOSS4G https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgatewaygeo.com%2F&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=brYlwYiuoO%2FGu2Du5XWHus%2BnKwyazc4Nrs661jfhEO0%3D&reserved=0 On 2022-06-03 4:25 p.m., Bourdon, Jean-François (DIF) via QGIS-Developer wrote: > Intranet logo > > Hi Devs, > > I had a surprising issue with a specific vector layer and a clip > operation. Validity check of the geometries seem to be done differently > if native:clip is used inside a processing script or manually through > the GUI as a vector layer containing a linestring with duplicate node > like LINESTRING ((0 0, 1 0, 1 0)) won't cause an issue when the clip is > done with the GUI but will halt if done inside a processing script (on > QGIS 3.22.6). > > Also, if I run */qgis:checkvalidity/* with the *GEOS* method, no error > is found, but if I run it with the *QGIS* method, it finds one error > (/line 1 contains 2 duplicate nodes starting at vertex 2/). So here are > my questions: what exactly is checked when using the GEOS method and > what is checked using the QGIS method? Also, do all processing tools > (qgis: and native: ones) use the same kind of check? > > I didn't find anywhere the details of what would be considered an error > according to the "QGIS spec". Is it documented somewhere or do I need to > look for hints inside the source code? As for the GEOS method, I only > found some error examples in the PostGIS documentation and in a FME page > (https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcommunity.safe.com%2Fs%2Farticle%2Finvalid-ogc-geometry-examples&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=iAvp2%2FdNUCBjYFdhKug6dNgJSEYn495pZUPbjv9RUdA%3D&reserved=0 > <https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcommunity.safe.com%2Fs%2Farticle%2Finvalid-ogc-geometry-examples&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=iAvp2%2FdNUCBjYFdhKug6dNgJSEYn495pZUPbjv9RUdA%3D&reserved=0>). > Is there an official documentation of what geometries are invalid > regarding GEOS? > > Thanks a lot for any pointer > > *Jean-François Bourdon, ing.f.* > > *Analyste en télédétection* > *Direction des inventaires forestiers* > *Ministère des Forêts, de la Faune et des Parcs* > 5700, 4^e Avenue Ouest, local A-108 > Québec (Québec) G1H 6R1 > Téléphone : 418 627-8669, poste 704304 > *_jean-francois.bour...@mffp.gouv.qc.ca_* > *mffp.gouv.qc.ca* <http://www.mffp.gouv.qc.ca/accueil.jsp> > > _______________________________________________ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fmailman%2Flistinfo%2Fqgis-developer&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SDTmZzpfnsTKfTNixdcVHZdDgNcJvG5mBEhZMgdjkig%3D&reserved=0 Unsubscribe: https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fmailman%2Flistinfo%2Fqgis-developer&data=05%7C01%7Cjean-francois.bourdon%40mffp.gouv.qc.ca%7C334dac66b1924017ad1b08da4615caf3%7C8705e97737814f4790e1c84c8b884da1%7C0%7C0%7C637899356658306764%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SDTmZzpfnsTKfTNixdcVHZdDgNcJvG5mBEhZMgdjkig%3D&reserved=0 _______________________________________________ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
