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1:25 000 Scale Colour Raster support

The data equivalent of our OS Explorer paper map series, 1:25 000 Scale Colour Raster tiles are high-quality digital maps that you can embed in your GPS device or mobile app.

Colour palette update

We’re upgrading our production system for 1:25 000 Scale Colour Raster to ensure we can support it in the longer term.

As part of the upgrade, we’re updating the product’s colour palette. Although we’ve matched the colours in the new system to the existing palette where possible. four of the colours have changed slightly. This may be visible when updated tiles are displayed next to old ones.

To ensure the visual appearance of the data in your system is of the highest quality, we’re offering a full resupply of your tile holdings in the December refresh. This will baseline your holdings with the new palette. Change-only update supplies will resume from the March 2017 refresh.

If you prefer to load only tiles that contain real-world changes, please download our list of them (Excel file). Example screenshots are below:

Their appearance can vary depending on your screen display.

Symbol updates

The upgraded production system also lets us modernise some symbols in the 1:25 000 Scale Colour Raster product. They give more information to users and to reflect the changing nature of our landscape.

As part of the design process, we ran a competition with the BBC's The One Show, when the general public sent in designs to replace the exisiting symbols. The winning symbols will start appearing as tiles are revised and supplied in normal change-only update refreshes.

Can I define my own area?

Yes, it is possible to order user defined areas by:

  • Specific tile identities;
  • administrative region; or
  • bounding box.


The product is also available by:

  • Great Britain
  • England
  • Scotland
  • Wales

Please note that tiles are supplied whole, rather than clipped to fit geographic areas.

Does Ordnance Survey provide a list of updated tiles?

Ordnance Survey provides a list of tiles that were updated for that release on the product Technical Information page. The product is updated every March, June, September and December.

When were my tiles last updated?

Ordnance Survey provides a list of every tile depicting the date they were last updated on the Technical Information page for the product.

Can I georeference the data file?

To locate 1:25 000 Scale Colour Raster data tiles in their correct geographic position in a GIS they need to be 'georeferenced'. Refer to the Technical Information or follow the link below about geo-referencing.

Geo-referencing information

Can I convert it into a monochrome image?

It depends on which software package you are using. Some packages have a facility whereby you can load the colour image onto a computer and, using one of the command drop-down menus, select the greyscale option. This will change the colours on an image to shades of grey (greyscale). This is not the same output as monochrome where features in the file are either black or white.

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