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Ordnance Survey – Great Britain's national mapping agency
| Specification | Strategi | ||||
| Data source | 1:250 000 scale digital database | ||||
| Availability | Great Britain, England, Scotland and Wales | ||||
| Coordinate resolution | 1.0m | ||||
| Data structure | Vector link and node | ||||
| Feature codes | 216 | ||||
| Transfer format |
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| Storage volumes (approximate) |
NTF | DXF | Shapefile | MID/MIF | |
| Great Britain | North | 63Mb | 262Mb | 358Mb | 79Mb |
| South | 89Mb | 357Mb | 344Mb | 111Mb | |
| England | North | 28Mb | 115Mb | 195Mb | 35.4Mb |
| Mid | 54Mb | 210Mb | 370Mb | 66.7Mb | |
| South | 26Mb | 105Mb | 174Mb | 32.3Mb | |
| Scotland | 49Mb | 206Mb | 344Mb | 61.3Mb | |
| Wales | 18.5Mb | 206Mb | 127Mb | 28Mb | |
| Update interval | 12 months | ||||
The following archives of Strategi data are available for download:
Contents: tile SS
File name: ss.ntf
Format: NTF
File size: 1.1 Mb
Contents: tile SS
File name: ss.dxf
Format: DXF AutoCAD (compatible release 12)
File size: 1.8 Mb
Contents: Files for AutoCAD viewing of extended entities of DXF format files
File names: showeed.dcl, showeed.lsp
Format: For use with DXF
File size: 31 Kb
Contents: tile SS
File names: mid/mif files
Format: mid/mif
File size: 1.5 Mb
Contents: tile SS
File names: shape files
Format: shp/dbf
File size: 1.8 Mb
If you haven't downloaded or used sample data before, we recommend that you read our guidance notes.
The user guide contains information on the technical specification and product specification for Strategi to help you understand how to use the data.