Product supply

Available formats

1:250 000 Scale Colour Raster is supplied in TIFF (RGB 256 colours) format with LZW compression.

Supply mechanism

1:250 000 Scale Colour Raster is supplied as an online download from the OS DataHub.

Package inclusions

The compressed download file includes (among others):

• 56 edged-matched individual 100km by 100km tiles aligned to the National Grid.

• Product legend in TIFF and PDF format.

• 1:250 000 scale gazetteer

Ordnance Survey National Grid

Ordnance Survey divides Great Britain into squares of 100km by 100km. Each square has a unique two-letter reference, for example, TG in the grid below. 1:250 000 Scale Colour Raster tiles are identified by the National Grid reference of the south-west corner of the 100km2 area they cover.

An introductory guide to the British National Grid (BNG) is available on the OS website.