3min chapter

99% Invisible cover image

Map Quests: Political, Physical and Digital

99% Invisible

CHAPTER

Is There a Trig Point?

The trig pillars are only the tip of a much larger surveying infrastructure that is actually all around us. If you keep your eyes out, you tend to see it in the UK anyway. There's probably about a million of them put in I would think. Surveyors use much, much smaller markings. Really just these little notches made in the landscape.

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