Kate and Sawyer stay at the second triangulation point, while Sayid goes to the third.
Thereafter he used, where possible, the triangulation points used by Cassini in his 1744 survey of France.
They were a key component in being able to calculate distances and topography in the early West by using a baseline and these triangulation points.
The mountain's height was determined already in 1820 and it was used as an important triangulation point.
It is a storm shelter and a triangulation point.
It reaches a height of 466' (142m) above sea level at Pen-y-fan, marked by a triangulation point.
For the same reason, in 19th century Okenhöhe was uses for a triangulation point as other triangulation points can be measured.
The known points used for point positioning can be triangulation points of a higher order network, or GPS satellites.
The steeple, which can be seen from miles around, was used as a triangulation point when creating the map of France.
Two triangulation points were established at the summit.