CSO Electoral Divisions - National Statistical Boundaries - 2022 - Generalised 20mCSO EDs are a statistical geography that aligns closely with the official ED boundary. EDs are comprised of whole Small Areas. In a small number of cases, CSO EDs do not align with the official boundary, where EDs are amalgamated to ensure statistical confidentiality or where a change was required to ensure better CSO ED/CSO alignment.Creation of generalised versions of Published ED boundaries. Using Douglas-Peucker algorithm with tolerances of 20m, 50m, 100m and writes out features classes. Uses topology and option of preserving common boundaries to ensure output does not generalise differently on common boundaries.Update Notice: 4th August 2023: ED and LEA attributes changed on 15 SAs.  As a result of the changes to SAs, CSO ED has one additional ED and the number of CSO EDs is 3420 and there is a change to 2 CSO LEAs. The ED and LEAs impacted are <o:p></o:p> ED 2ae19629-1d37-13a3-e055-000000000001 renamed to DALKEY-COLIEMORE<o:p></o:p> ED 94b26e15-6ed2-44c2-a0b0-207c369a2da8 SHANKILL-RATHSALLAGH added<o:p></o:p> LEA 40aece0e-a19d-4e78-af9d-e129f5557496  DÚN LAOGHAIRE redrawn<o:p></o:p> LEA d65ef6e7-75e6-49d9-bda9-d4690e8f68dc KILLINEY-SHANKILL redrawn<o:p></o:p>