May 2020

No limit

SHP, TAB

N/A

N/A

Ordnance Survey OpenData Licence

Contains Ordnance Survey data © Crown copyright and database right 2020

1:10,000

N/A - single dataset covering the whole of Great Britain

• Development and land use planning
• Environmental Impact Analysis
• Marketing analysis

• Official User Guide: http://www.ordnancesurvey.co.uk/docs/user-guides/boundary-line-user-guide.pdf
• Official Getting Started Guide: https://www.ordnancesurvey.co.uk/docs/user-guides/os-opendata-getting-started-guides.pdf
• Ordnance Survey Product Information: http://www.ordnancesurvey.co.uk/business-and-government/products/boundary-line.html
• Ordnance Survey Support Information: http://www.ordnancesurvey.co.uk/business-and-government/help-and-support/products/boundary-line.html

Boundary-Line is the key dataset of administrative and voting boundaries in Great Britain.

Contents of Boundary-Line

Boundary-Line contains all the current (operative) administrative and electoral boundaries for Great Britain:

• Civil parishes
• Wards
• Communities
• Districts
• Counties
• Metropolitan districts
• Unitary authorities
• Parliamentary constituencies
• Electoral divisions
• London boroughs
• Greater London authorities
• Greater London authority assembly constituencies
• European electoral regions
• Welsh assembly constituencies
• Welsh assembly electoral regions
• Scottish parliamentary constituencies and;
• Scottish parliamentary electoral regions

The product also contains mean high water mark (MHW), extent of realm (EOR) also census agency codes supplied by the Office for National Statistics (ONS), and the General Register Office for Scotland (GROS).

Feature position

The geometry of map features is defined in terms of coordinates. All coordinates used in Boundary-Line are based on the Ordnance Survey National Grid (NG) coordinate referencing system and are quoted to a 0.1 m resolution. Despite this, Boundary-Line data can be no more accurate than its source, primarily the generalised 1:10 000 scale mapping. There will be positional differences between the boundaries in Boundary-Line and Ordnance Survey large-scale topographic products. This is due to the large-scale products being surveyed to a higher degree of accuracy and associated to ground surface features, at scales such as 1:1250 and 1:2500.

Boundary-Line has been created as a more generalised set of administrative and electoral boundaries for the whole of Great Britain. It has been digitised against Ordnance Survey (generalised) 1:10 000 Landplan^® mapping. The process of generalising for 1:10 000 scale mapping may have caused certain features to be moved from their true ground position for the purposes of map clarity. The result being Boundary-Line and large-scale boundaries will not always be coincident.

During digitising all Boundary-Line data is checked thoroughly against source documents to ensure as far as reasonably possible that no features have been omitted or misaligned.

http://www.ordnancesurvey.co.uk/docs/user-guides/boundary-line-user-guide.pdf