I have a uk postcode layer that in have clipped to the boundary of my authority and have then used the dissolve function to aggregate these into postcode sectors. When I do this though there are hundreds of little rings left over by the vertical postcodes (blocks of flats I presume). I wish to remove these but don't know how to delete rings apart from clicking on each one.
Is there a function someehwere i could use (grass?) or do need to write python script? Thanks Matt
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