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: Full resolution - extent of the realm (usually this is the Mean Low Water mark but in some cases boundaries extend beyond this to include off shore islands); Contains both Ordnance Survey and ONS Intellectual Property Rights. Download File SizesFull resolution - extent of the realm (191 MB)REST URL of ArcGIS for INSPIRE View Service – https://ons-inspire.esriuk.com/arcgis/rest/services/Census_Boundaries/Middle_Super_Output_Areas_December_2011_Boundaries/MapServer/exts/InspireViewREST URL of ArcGIS for INSPIRE Feature Download Service – https://ons-inspire.esriuk.com/arcgis/rest/services/Census_Boundaries/Middle_Super_Output_Areas_December_2011_Boundaries/MapServer/exts/InspireFeatureDownloadREST URL of ArcGIS Feature Service – https://ons-inspire.esriuk.com/arcgis/rest/services/Census_Boundaries/Middle_Super_Output_Areas_December_2011_Boundaries/FeatureServer