Méridienne verte

The Méridienne verte (Green Meridian) is a project devised by the architect Paul Chemetov for the 2000 celebration in France. It involved marking on the ground the Paris Meridian crossing France from North to South (from Dunkerque in Nord-Pas-de-Calais to Prats-de-Mollo-la-Preste in Pyrénées-Orientales) by planting trees along the whole line.[1]

Medallion on a Méridienne verte marker in the Rue de Rivoli, Paris 1

On 14 July (Bastille Day) 2000, a picnic was organised along the length of the Méridienne verte. For the occasion, the imaginary line was marked in the sky above Paris by two lasers, located on the Observatory, whose centre defines the longitude of the meridian, and the nearby Senate, also on the line. With a diameter of 4 m and a reach of 1.3 km, their coloured beams lit up the 6th and 14th arrondissements of Paris for three consecutive nights, from 13 to 15 July.

At the intersection of the Meridian and the 45th parallel, in the commune of Ayrens (Cantal), trees have been planted in two perpendicular lines to mark the crossing.

Communes crossed

From North to South, the Méridienne verte crosses 8 régions, 20 départements and 337 communes.

Monument marking the Meridian at Dunkerque
Stele at Saint-Martin-du-Tertre. The inscription refers to the geodesic survey of France 1866-1883.
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See also
  • Paris Meridian

References
  1. Paul Murdin, Full Meridian of Glory: Perilous Adventures in the Competition to Measure the Earth, page 4 (Copernicus Books, 2009). ISBN 978-0-387-75533-5
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