A reference point on high ground used in surveying, typically marked by a small pillar.
- After a couple of miles, we reached the high point of the walk, a triangulation point at 1,000 feet gleaming with fresh white paint.
- Follow the broad southern ridge to the summit triangulation point, and take care, for this is easily missed in poor visibility.
- He started with his house and local church towers as the triangulation points, eventually computing the distance between Alkmaar in the North and Bergen-op-Zoom in the South, a distance of 130 km.
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