Within Sight

Could Britain and Ireland's 4,147 hillforts see each other? A line-of-sight network across two islands.

Open the interactive map → Read the story Code on GitHub

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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