Hey Michael,the algorithms involved are Douglas-Peucker and Visvalingam. With those terms you might find some nice explanations and guidance online. Some quick links:
- http://bl.ocks.org/msbarry/9152218 - https://dulldrums.github.io/polygon-reduction-algorithms-demo/ - https://ignf.github.io/CartAGen/docs/algorithms/line/visvalingam.htmlFor your use case (keeping the overall shape) I would try Visvalingam first as that is pretty much its goal too.
Cheers, Hannes Am 27.06.22 um 16:52 schrieb Michael.Dodd via Qgis-user:
I know there are various simplify tools in qgis but perhaps I don’t understand how to use them best. I want to simplify i.e. reduce the number of nodes in a polygon without changing the overall shape too much for country or similar outlines. When I have tried this the simplify tends to chop off bits that a human doing a manual simplification would not, in some areas the simplification could loose loads of nodes whereas in other areas it needs to keep more of them or the overall shape will be greatly changed. Is there anyway round this or am I asking for something that is not logical?_______________________________________________ Qgis-user mailing list [email protected] List info:https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user
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