Triangulation
Roseberry Topping Triangulation pillars, are columns made of cast concrete or cemented stone. They are typically four feet tall, with a large part of each pillar commonly buried below the earth's surface. They are also known as trig points. There are more than 6500 of these pillars located throughout Great Britain - often in pretty inaccessible places. They were mostly erected in the 1930's and were vital to the process of accurate surveying. The iconic trig pillar was designed by Brigadier Martin Hotine in 1935. Hotine designed them to assist with triangulation - separating our country into a network of triangles, allowing precise mapping of the landscape. Burbage Moor In modern times, better surveying techniques have been developed - to such a point that the little pillars are now redundant. However, they still dot the country and appear in "Ordnance Survey" mapping. They are often a focus or indeed a diversion for walkers. People will frequently pause ...