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How can I get the UK Land Cover 2007 25m raster data set from Digimap to work in QGIS?


I have downloaded the UK Land Cover 2007 25m raster data set from Digimap (which my university has a subscription to). I have uploaded the data into ArcMap where it works fine, with all 23 classes and colours shown. However, when I upload the data into QGIS (which all my other data works on) it says the raster is not a supported file type. It appears in black, grey and white and I cannot find a way to get it to appear with the 23 colours and classes it should have. When I downloaded the data set it came with; AUX file, XML document, OVR file, DBF file and LYR file(which has raster in the name).

Is there a way to get it to work in QGIS? I am open to any suggestions. Could I convert it to a supported file type in Arc and bring it into QGIS?


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:

  1. 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.

  1. 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.

  2. Click the Classify button

  3. 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.

  4. 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:

http://digimap.edina.ac.uk/webhelp/resources/files/lcm2007_25m_Raster.zip


Using the WMS tile service from

http://lasigpublic.nerc-lancaster.ac.uk/arcgis/services/LandCoverMap/LCM2007_GB_25m_V2/MapServer/WMSServer

can load the Landcover tiles in with QGIS

You can save out for local files or create vector file from raster using the grass tools (r.to.vect)


You can get your desired data after making a free account on this website earthexplorer.usgs.gov You can download landsat7 as well as landsat8 satellite imageries from this site and can perform image classification in order to get required land cover.


Watch the video: Download map data from Digimap (October 2021).