Ordnance Survey – Great Britain's national mapping agency
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Technical information
Specification | Boundary-LineTM | |||
Coverage | Great Britain, (England, Scotland and Wales) | |||
Availability | Order by:
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Data source | Boundary-Line original source compilation is the boundary alignments, textural descriptions contained in the Statutory Instruments and is digitised against 1:10 000 scale raster mapping. | |||
Data structure | Vector | |||
Scale | All boundaries depicted in Boundary-Line are captured and maintained against a generalised 1:10 000 scale raster product | |||
Transfer format | ESRI® Spatial data format (Shapefile) | |||
Number of files in series | Great Britain | England | Scotland | Wales |
830 | 662 | 100 | 68 | |
Supply media | CD | |||
Coordinate resolution | The coordinates of Boundary-Line are stored to decimetre precision (0.1m) | |||
Standard supply interval | Once every 12 months (either spring or autumn release) | |||
Update Interval | Boundary-Line is revised twice a year and is released as a fully updated product each spring (May) and autumn (October ), showing boundaries as at the first week of May of the year of release | |||
Styling | A separate symbol set is not supplied with this product | |||
Geometric types | Polygons | |||
Coordinate reference system | British National Grid (OSGB36 ®) | |||
Unique identifier | Persistant unique identifiers (PUI's)are provided with Boundary-Line | |||
| Layered | This is a simplified file structure supplying the boundaries as individual files, e.g. Parish layer contains only parishes and MHW only has the mean high water feature.
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User guide
The user guide contains information on the technical specification and product specification for Boundary-Line to help you understand how to use the data.
Boundary-Line user guide Version 1.8 (1.3 MB) PDF
ONS Government Statistical Service codes
In the next release of Boundary-Line (October 2010) we will be implementing new Government Statistical Service (GSS) codes and names supplied by the Office for National Statistics.
The new GSS Coding and Naming policy for some statistical geographies will be implemented on 1 January 2011. From this date, where new codes have been allocated they should be used in all exchanges of statistics and published outputs that normally include codes.
Please click the following link to access the old codes to new codes spreadsheet.
GSS coding spreadsheet (zip file 657 KB)