Strategi^®

Specification

Strategi^®

Coverage

Great Britain, England, Scotland and Wales

Availability

Order by;

National Extent (GB)

Country Extent (England, Scotland or Wales)

Data source

1:250 000 scale digital database.

Data structure

Vector.

Scale

Nominal scale is 1:250 000.

Strategi can be viewed between 1:90 000 and 1:250 000 scales.

The Strategi product is best viewed between 1:100 000 to 1:175 000 scales.

Transfer format

• BS 7567 (NTF v2.0) Level 3
• DXF AutoCAD^® (compatible release 12)
• ESRI Shapefile / E00 text
• MapInfo MID/MIF

Storage volumes
(approximate)

NTF

DXF

Shapefile

MID/MIF

Great Britain

North

60Mb

254Mb

578Mb

83Mb

South

83Mb

348Mb

779Mb

117Mb

England

North

28Mb

117Mb

262Mb

39Mb

Mid

48Mb

200Mb

456Mb

67Mb

South

36Mb

150Mb

325Mb

51Mb

Scotland

49Mb

206Mb

467Mb

66Mb

Wales

18Mb

73Mb

163Mb

24Mb

Supply media

CD

Coordinate precision

1.0m

Update interval

12 months

Styling

There is no symbol set for this product but explicit styling is supplied in MID/MIF format only.

Geometry types

• Line
• Point
• Annotation (text)
• Polygons:
  • NTF and DXF – polygons are implicit, that is, there is appropriate information within the data for a GIS to create polygons.
  • ESRI Shapefile and MapInfo MID/MIF – polygons are explicit, that is polygons are already created in the data with no further GIS processing required.

Coordinate reference system.

British National Grid (OSGB36).