General levelling of France
The General Levelling of France (nivellement général de la France or NGF) forms a network of benchmarks in mainland France and Corsica, now overseen by the Institut Géographique National. It is now the official levelling network in mainland France. It is made up of two networks:
Coordinates: 43°16′42″N 5°21′12″E / 43.27833°N 5.35333°E
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