I have generated several bathymetry layers using the contour plugin. These are saved in memory. I have installed the memorylayer saver plugin which recognises the layers concerned. When I try to make the layer permanent I get the error below.
How can I make these layers permanent?
Could not make temporary scratch layer permanent. Error: Feature write errors: Feature creation error (OGR error: Cannot insert feature with geometry of type GEOMETRYCOLLECTION in column GEOMETRY. Type MULTIPOLYGON expected) Feature creation error (OGR error: Cannot insert feature with geometry of type GEOMETRYCOLLECTION in column GEOMETRY. Type MULTIPOLYGON expected) Only 8 of 10 features written.
QGIS version 3.18.1-Zürich
I've removed the plugins as they may be the problem. However, I cannot see a suitable built in contour tool as when I search contour I only get Raster or Mesh tools and my source is a file of points. That's why I installed the plugin. I have successfully worked with contours from raster files.
What tool should I use?
Perhaps there is an intermediate step.
This now works. I've upgraded to 3.18.3 and re-installed the Contours plugin. The contours generated in memory can now be saved. I'm not sure what was wrong but it now works.