Counties Ireland 1911: 34 counties which includes thirty two counties and two urban areas of Belfast and Dublin.This boundary has been generated by aggregation and dissolving boundaries based on common value of County code. Slivers and gaps removed in this processing.The boundaries established for these areas were created from scanned maps and some boundaries were provided from other organizations who previously worked on this. Areas stated on the census tables were used to quality check the areas of each DED. There is no singular and accurate source for mapping representation available - this map is a best effort and indicative of location only.A special thanks to the open source OpenStreetMap (OSM) for providing data for Northern Ireland, and also to Mike Murphy at UCC who provided a map of Ireland at DED level that we could use to reference boundaries.Taillte Éireann provided 1911 boundary maps to the CSO with the following disclaimer: "This cartographic data is a digital representation of the 1911 ED and Poor Law Union datasets. It is for display purposes only and legal boundaries past or present cannot and should not be inferred from this map."OpenStreetMap shapefiles were provided in accordance with their copyright requirements.Scanned copies of Census 1911 Original Reports : Area, houses and population are available here Implements CSO classificationsC04131V04897 - Census 1911 County Classification number

DEDs can be aggregated to form what are known as Urban and Rural Districts (URDs). URDs were administrative divisions in Ireland created in 1899. There were 309 URD's in Ireland in 1911 . This boundary has been generated by aggregation and dissolving boundaries based on common value of URD code. Slivers and gaps removed in this processing.1911 District Electoral Division (DED) map of Ireland. In 2001, the names of DEDs changed to what are now known as Electoral Divisions. There were 3,673 DEDs in Ireland in 1911 and they are the smallest legally defined administrative areas in Ireland. The boundaries established for these areas were created from scanned maps and some boundaries were provided from other organizations who previously worked on this. Areas stated on the census tables were used to quality check the areas of each DED. There is no singular and accurate source for mapping representation available - this map is a best effort and indicative of location only.A special thanks to the open source OpenStreetMap (OSM) for providing data for Northern Ireland, and also to Mike Murphy at UCC who provided a map of Ireland at DED level that we could use to reference boundaries.Taillte Éireann provided 1911 boundary maps to the CSO with the following disclaimer: "This cartographic data is a digital representation of the 1911 ED and Poor Law Union datasets. It is for display purposes only and legal boundaries past or present cannot and should not be inferred from this map."OpenStreetMap shapefiles were provided in accordance with their copyright requirements.Scanned copies of Census 1911 Original Reports : Area, houses and population are available here Implements CSO classificationsC04057V04819 - Census 1911 Urban/Rural Areas Output ClassificationC04131V04897 - Census 1911 County Classification number

1911 District Electoral Division (DED) map of Ireland. In 2001, the names of DEDs changed to what are now known as Electoral Divisions. There were 3,673 DEDs in Ireland in 1911 and they are the smallest legally defined administrative areas in Ireland. DEDs can be aggregated to form what are known as Urban and Rural Districts (URDs). URDs were administrative divisions in Ireland created in 1899. There were 309 URD's in Ireland in 1911 . The boundaries established for these areas were created from scanned maps and some boundaries were provided from other organizations who previously worked on this. Areas stated on the census tables were used to quality check the areas of each DED. There is no singular and accurate source for mapping representation available - this map is a best effort and indicative of location only.These boundaries have been generalised to a tolerance of 20m via Deveau method.Scanned copies of Census 1911 Original Reports : Area, houses and population are available here Implements CSO classificationsC04056V04818 - Census 1911 District Electoral Divisions(DEDs) Output ClassificationC04057V04819 - Census 1911 Urban/Rural Areas Output ClassificationC04131V04897 - Census 1911 County Classification numberA special thanks to the open source OpenStreetMap (OSM) for providing data for Northern Ireland, and also to Mike Murphy at UCC who provided a map of Ireland at DED level that we could use to reference boundaries. Taillte Éireann provided 1911 boundary maps to the CSO with the following disclaimer: "This cartographic data is a digital representation of the 1911 ED and Poor Law Union datasets. It is for display purposes only and legal boundaries past or present cannot and should not be inferred from this map."OpenStreetMap shapefiles were provided in accordance with their copyright requirements.