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The Trig Point, a concrete ring, at the highest point, Hallsfell spur, of Blencathra Mountain, Lake Districts, Cumbria, UK. Trig Points are the common name for Triangulation Pillars are used by Ordnance Survey to determine the exact shape of the country by creating direct line of sight to another Trig Point. The beautiful hills and valleys of the Lake District National Park surrounds the mountain. The sky is cloudy and overcast. (photo by Andrew Aitchison / In pictures via Getty Images)

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Filename: UK-Tourism-Lake-District-9097.jpg
Copyright: Andrew Aitchison
Image Size: 4724x3149 / 3.7MB; www.andrewaitchison.com; Blencathra Cumbria England English Lake District Landmark OS Ordnance Survey Saddleback Triangulation Pillars Trig Point UK United Kingdom circle concrete countryside day environment explore fells footpath geography geology highest point hillside horizontal landscape map maths measurement mountain mountain peak mountainside national park natural nature no people outdoors path peak pillars ring rocks rural scene stones trail triangulation
Contained in galleries: Lake District

The Trig Point, a concrete ring, at the highest point, Hallsfell spur, of Blencathra Mountain, Lake Districts, Cumbria, UK. Trig Points are the common name for Triangulation Pillars are used by Ordnance Survey to determine the exact shape of the country by creating direct line of sight to another Trig Point. The beautiful hills and valleys of the Lake District National Park surrounds the mountain. The sky is cloudy and overcast. (photo by Andrew Aitchison / In pictures via Getty Images)