I have a bunch of kmz files which I need to merge into one so I can convert it into one polygon shapefile using QGIS.
The problem is that I have some kmz that are polygon, and some that are polygonz and QGIS wont allow the merging of different types of geometry.
So, how can I convert all those polygonz at once (batch) into polygon? (without the z attribute)?
(I know I can save one by one as shapefile than change the geometry type, but I wonder if there is a faster way since I have many layers)