1:10 000 Scale Raster

Specification

1:10 000 Scale Raster

Coverage

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

Availability

Order by:

· Great Britain

· England

· Scotland

· Wales

· User Defined area:

            Specific tile identities

            Administrative region

            Bounding box

            Irregular shape

All orders are supplied as tiles and are not clipped but supplied whole.

Data source

1:10 000 scale database, large scale database and roads database

Data structure

Raster

Scale

Nominal scale is 1:10 000.

Recommended minimum to maximum scale range for viewing is 1:5 000 to 1:15 000 scale.

It is best viewed between 1:5 000 to 1:8 000 scale.

Transfer format

Colour                                      

TIFF 8 bit uncompressed           

TIFF 8 bit LZW compressed

Black and White

Range of raster formats, including

• TIFF uncompressed
• BMP
• PCX
• Tiff group 3 compression
• Tiff group 4 compression
• Tiff PackBits

Note: MapInfo version 8 supports TIFF Group 4 compression.

Colour Options

Colour raster.

Colour is used for map detail and text to help with the cartographic interpretation of features with:

Settlements – black outline and brown stipple infill

Water features and sea areas including text – blue

Vegetation – green

All other features – black

Black and white raster.

All map detail and text are black

A high quality alternative to black and white data is to use a GIS system to convert colour data to a greyscale format.

Approximate storage volumes per tile

• Uncompressed: 60 Mb
• Compressed: 8 Mb - 15 Mb

• Uncompressed: 8 Mb
• Compressed: 0.3 Mb - 6 Mb

Tile size

5 km by 5 km

Number of tiles in Great Britain

10 586 (edgematched)

• England: 5 702
• Scotland: 4 014
• Wales: 1 008

National GB coverage = 10 586 tiles.

Where the border between countries runs across a tile it will be counted in with the coverage on each side of the boundary. This will result in the number of tiles for each country totalling more than the number of tiles for national coverage.

Supply media

CD and DVD

Resolution

400 dots per inch where 1 dot is equivalent to 0.635m on the ground

Update frequency

The product is continually updated

Current supply interval is every 12 months

Change only update is supplied.

Date of supply of updated information will vary according to the terms in the product contract.

A list containing a revision date for every tile covering Great Britain is updated monthly and published on our website

Styling

The product has a legend which is available as a download from this product web page

Geo-referencing files

A geo‑referencing file for each tile in the series is available for free download, in either TIFF World File or MapInfo TAB file

Coordinate Reference System

British National Grid (OSGB36)