The CEH data is a single band greyscale Tiff that has an Esri .lyr file associated with it to style it with the appropriate colours. This is not the most straightforward option for this dataset but it is consistent with other datasets that have multiple colour schemes.
Digimap now provide a QML file along with the Layer file to make the data more interoperable.
To make your own QML file for a single band greyscale tiff follow these steps in the Style Tab of the Properties:
- In the Band rendering section change the Render Type to Singleband Pseudocolor
If you don't know how many different values there are in the raster follow this step... In the Load the min/max values select Min/max then click the Load button. Above in the Generate new color map section you should now have the highest and lowest values, which should give you a good idea in most cases.
In the Generate new color map section select: Random colors, Mode Equal Interval and change the number of classes to be the number of different values in the raster, in this instance that is max +1 = 24 as the lowest value is 0 and the numbers range up to 23.
Click the Classify button
You will now have 24 (0 to 23) entries with random colours assigned that can be manually edited according to the style guide in the data's accompanying documentation.
Click the Style button at the bottom of the Style tab and then save the style as a QML file.
A version of this dataset's QML file can be found here: