Tristan Hotham

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Early modern and modern

Britain’s Last Line of Defence

14,690 pillboxes and defences of 1940: the planned German landing beaches had 2.3 times the average density.

Britain’s Last Line of Defence: preview of the interactive map

This is an interactive data study by Dr Tristan Hotham, built from open data. The map runs in your browser: explore it, search for places and switch layers. The write-up explains the method and what the data shows, and the data and code are open for anyone to reuse.

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