More intelligent polygon detection
More intelligent polygon detection

This tolerates drawn regions that aren't quite closed but are within a
certain threshold, as well as avoids shapes with nested overlapping
regions.

GCRC/nunaliit,GCRC/nunaliit,drobilla/nunaliit,drobilla/nunaliit,GCRC/nunaliit,drobilla/nunaliit,GCRC/nunaliit,GCRC/nunaliit,GCRC/nunaliit,GCRC/nunaliit,GCRC/nunaliit,drobilla/nunaliit,drobilla/nunaliit