BBC story: ancient hill fort mapping ndm ಅವರಿಂದ 8 ಜುಲೈ 2013 ರಂದು English ನಲ್ಲಿ ಪೋಸ್ಟ್ ಮಾಡಲಾಗಿದೆ Volunteer army drafted to map every (UK) ancient hill fort – perhaps they should’ve asked OSM?
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