Trig Point
More than 6500 Trig Points, or Triangulation Points, were built across Britain between 1936 and 1962, as part of a big project to re-triangulate Britain. The last observation was made in 1962 from Thornley Gale, Cumbria.
This one is at the top of Arnside Knott. It's easy to see that it isn't used any more as trees obscuring the view had grown up around it. However, trig points are still marked on OS maps, and useful landmarks for walkers.
GPS has made these markers redundant for survey purposes.
Trig Point
More than 6500 Trig Points, or Triangulation Points, were built across Britain between 1936 and 1962, as part of a big project to re-triangulate Britain. The last observation was made in 1962 from Thornley Gale, Cumbria.
This one is at the top of Arnside Knott. It's easy to see that it isn't used any more as trees obscuring the view had grown up around it. However, trig points are still marked on OS maps, and useful landmarks for walkers.
GPS has made these markers redundant for survey purposes.