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Randonnées Trig point

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Trig point stands on the edge of a hill rather than the top - a reminder that they are not summit markers! Trig points were placed on prominent points from 1935. In clear weather you should have been able to see at least two other trig points from any trig point (eg. Ivinghoe Beacon). Careful measurements of the angles between the lines to other trig points enabled the construction of a highly accurate geographical measurement system. Now we have GPS they are no longer used and many have fallen into disrepair or are hidden by vegetation.

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