I've created a polygon from lines in a couple of cases where I'm unable to select the polygon using the standard Select Features button. I am able to select the feature using the Attributes Table, but in neither case am I able to actually cut and paste the polygon from that layer to another layer.

Any ideas?

(Using QGIS 2.18 on OSX)


Your polygon isn't closed. If you open the Log Messages Panel you'll see a message on the GEOS tab:

Exception: IllegalArgumentException: Points of LinearRing do not form a closed linestring
  • Aha - I'll dig around to see if I can find that - thanks so much! I was guessing / hoping it was something straightforward. Not sure how it's not closed, as all end points are snapped, but I'm sure there's something I've missed. Thanks! – jeffme Feb 26 '18 at 6:05

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