Changelog for Revision 4 of 'Statistical Area 1 Higher Geographies 2021 (generalised)'

26669 - Ring Self-intersection[1516877.692 5185719.803] - FIXED

18174 - Ring Self-intersection[1791687.7022 5536878.3512] - FIXED

23793 - Ring Self-intersection[1381753.8196 5204150.6663] - FIXED