1

I am trying to implement line simplification on a polyline dataset using SimpliPy in QGIS but there is not an option for the output dataset. There are two notes mentioned in the plugins repository ( https://plugins.qgis.org/plugins/simplipy/ ): - You must have installed Shapely 1.2.18 or you will get an error installing or using this plugin. - The output can only be saved to a "New layer" for now. (The Output:Field isn't working).

Can anyone help me with that?

2

I'm the author of the plugin:

The "output field" section was an option that appeared in versions < 0.30 but was never implemented and removed in 0.31. If you update the plugin version to the latest one you will see it's not there (I removed it basically because I didn't have time to manage how to make it work).

About LineStrings simplification: You are right, it's not implemented. Since it's very similar to simplifying polygons I will include it in the next version of the plugin.

  • I've released a new version of SimpliPy (0.40) which now supports LineString and MultiLineStrings. – AlbertFerras Dec 8 '15 at 11:31
  • Thanks a lot Albert. I would like to ask you two questions: 1. Do I need to run the plugin and then Save As the output file? 2. Can I see the execution time of the operation? – Vasilis Kaloyirou Dec 14 '15 at 1:01
  • @VasilisKaloyirou 1. Yes, you will need to use QGIS exporting tools to export the new SimplipY X layer. 2. In the current version you can't see it, but I'll include it on the next update. – AlbertFerras Dec 17 '15 at 15:27
1

Well, I tried the plugin but it seems like it does not support lines

Not supported geometry type: LineString

It works fine with polygons though (just click Start and it adds a layer with the simplification output as shown in the following screenshot)

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.