1:50 000 Scale Colour Raster

Specification

1:50 000 Scale Colour Raster

Coverage

Complete national coverage of Great Britain – England, Scotland and Wales.

Availability

Order by;

• Great Britain
• England
• Scotland
• Wales
• user defined areas;
  • specific tile identities;
  • administrative region; or
  • bounding box.

Tiles are supplied whole and not clipped to fit geographic areas

Data source

Landranger^® production data

Data structure

Raster

Scale

Nominal scale is 1:50 000.

Recommended minimum to maximum scale range is 1:15 000 to 1:60 000 scale.

It is best viewed between 1:20 000 and 1:50 000 scale.

Transfer format

• TIFF Palette 8 bit (256 colours) uncompressed
• TIFF Palette 8 bit (256 colours) with LZW compression
• Windows^® BMP 8 bit colour (256 colours) uncompressed
• Windows BMP 8 bit colour (256 colours) with RLE compression
• PCX 8 bit (256 colours)

Colour options

Colour

1:50 000 Scale Colour Raster data consists of a palette of 256 colours.

TIFF

TIFF (LZW)

BMP

BMP (RLE)

PCX

15Mb

10Mb

15MB

14Mb

18Mb

Tile size

20 km x 20 km

Number of tiles in Great Britain

815 (edge-matched)

Supply Media

CD (orders less than 650MB)

DVD (orders greater than 650MB where requested)

Resolution

254 dots per inch or 100 dots per centimetre.

Update Frequency

Change only update is available annually.

Update usually issued in June.

Styling

A legend is available as a downloadable PDF file:

View or download a PDF version of the legend (322 kb)

Georeferencing files

To locate 1:50 000 Scale Colour Raster data tiles in their correct geographical position in a GIS they need to be 'georeferenced'.

More information and download the files>>>

Coordinate reference system

British National Grid (OSGB36)