On Mon, 15 Mar 2021 at 09:34, Jorge Gustavo Rocha <[email protected]> wrote: > > Hi David, > > Thanks for replication this issue. "Join attributes by location > (summary)" is definitely the best choice for this use case. It creates > the new layer in a few seconds. That's why I think we are missing > something (spatial indexes?, dependency graph?) in the expression engine.
Actually there's LOTS missing - if you're not using the overlay_* method, then spatial indices won't be used at all - even if you use the overlay_* methods, the overlay tests are not optimised in any way (they don't use prepared geometries), so will always be orders of magnitude slower than the processing tools. Nyall > > There are anomalies in the data. That's almost the same with any dataset > we start working with :-) > > Regards, > > Jorge > > Às 21:47 de 14/03/21, David Strip escreveu: > > I was able to replicate your problem on my system (Win 10, QGIS 3.10.5). > > > > I tried "Join attributes by location (summary)". This computed the > > result in about 5 seconds. > > There are some anomalies in the data, however. For example, there's an > > entry for Belgium with province value "Unknown" and no lat/lon, so it > > doesn't get included in the total. Also, the point for Northern > > Territories, Australia, lies in the ocean, so it is not contained in the > > Australia polygon. > > > > J. Gustavo > -- > Jorge Gustavo Rocha > Departamento de Informática > Universidade do Minho > 4710-057 Braga > Gabinete 3.29 (Piso 3) > Tel: +351 253604480 > Fax: +351 253604471 > Móvel: +351 910333888 > skype: nabocudnosor > _______________________________________________ > QGIS-Developer mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
