This file contains the digital vector boundaries for Middle Layer Super Output Areas for England and Wales as at 31 December 2011. The boundaries available are: Generalised (20m) - clipped to the coastline (Mean High Water mark); Version 3 - Amendments made to remove spike anomalies which occurred due to the automated production process. No changes to boundaries, names and codes have been undertaken.Contains both Ordnance Survey and ONS Intellectual Property Rights. Download File SizesGeneralised (20m) - clipped to the coastline (10 MB)REST URL of ArcGIS for INSPIRE View Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/MSOA_(Dec_2011)_Boundaries_Generalised_Clipped_(BGC)_EW_V3/MapServerREST URL of ArcGIS for INSPIRE Feature DownloadService – https://dservices1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/services/MSOA_Dec_2011_Boundaries_Generalised_Clipped_BGC_EW_V3/WFSServer?service=wfs&request=getcapabilitiesREST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/MSOA_Dec_2011_Boundaries_Generalised_Clipped_BGC_EW_V3_2022/FeatureServer