Let's remove it. It can be distributed as 3rd party plugin. 2017-09-05 4:56 GMT+03:00 Nyall Dawson <nyall.daw...@gmail.com>: > Hi all, > > I'd like to propose that in processing in QGIS 3.0 we drop the 'Select > by Attribute Sum' algorithm. As you're probably aware we've been > cleaning up and streamlining the preinstalled algorithms that are > provided with QGIS, and I think this algorithm is a good candidate for > removal. > > (For clarification: this algorithm takes an input vector layer, field > selection and numeric value. It requires a single selected feature is > present in the input layer. It then loops through all neighbouring > features and 'dissolves' them into the selected feature. As soon as > the total attribute sum for all dissolved features exceeds the entered > value, the algorithm is complete) > > My thoughts are: > - The use case for this algorithm is very unclear for users - the name > does not describe what the algorithm does, and there's no help > documentation available for the algorithm either. Given this I suspect > that the algorithm is not being put into use. > - The algorithm needs enhancement to be more useful. There's no logic > in place which dictates how neighbouring features are chosen to > dissolve into the selected feature (it's effectively random - you're > just as likely to get a huge narrow polygon stretching across a map as > you are a nice compact cluster). To be more useful the algorithm would > need logic to either minimise the area of the dissolved feature, or > minimise the total number of dissolved features, or ... ? > > I think this algorithm should be moved to a processing plugin until > it's matured and had these shortcomings addressed. > > Any thoughts? > > Nyall > _______________________________________________ > 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
-- Alexander Bruy _______________________________________________ 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