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does anyone know where I can download a shapefile of 2km DINTY Tetrad squares for the UK please? A google search wasn't very helpful so I thought I'd try here.

A Tetrad is derived from the British National Grid, but is not the same as the British National Grid, so this is not a duplicate question.

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  • Are you sure this data is available for the UK? USA/Canada yes tetrad.com/maps_and_data/canada/census-boundaries
    – Mapperz ♦
    Nov 27, 2013 at 17:56
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    @Mapperz This question almost surely refers not to the company you link to but instead to the British Ordnance Survey Grid.
    – whuber
    Nov 27, 2013 at 19:51
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    This question is not a duplicate. The question linked as a duplicate is mine and the download containing OSGB grids provided in the answer also happens to my Git repo, so I'm familiar with the data. :-) I can definitely confirm that my repo doesn't contain tetrads, aka DINTY tetrads. So the question stands and is perfectly valid - if there is a DINTY tetrad dataset available for download I'd like to know so I can add it to my repo (at which point the question would indeed be a duplicate) ;-)
    – Charles Roper
    Sep 15, 2015 at 13:42

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there is a way in QGIS, using the TomBio plugin, to generate tetrad squares for an area of interest. More info and youtube tutorials available here.

To use this...

  • zoom to an area of interest e.g. using a web basemap and the QuickMapServices plugin.
  • turn on OTF projection and set to 27700 (OS GB)
  • select "Tetrad (2km)", show grid squares
  • click on the grid icon which doesn't have a yellow background
  • Click and Drag on the canvas to select an area

screenshot below...

enter image description here

this creates a memory layer but you can save it off as a shapefile etc. for later use.

The shapefiles that @charlesroper compiled on github - as mentioned in the comment - are really handy, but don't include tetrads (OS have LOTS of grids...)

I find grid generation can be slow if there are lots of cells so this may not be viable to generate the complete OS Tetrad grid, but hopefully it's useful for a specific survey/project

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