 The vertical logic imposed by the formula of the East India Company was not immutable and rather quickly, in order to deal with demographic pressure, there started to appear horizontal boundaries cutting the original strips into several plots situated one above the other.In 1732, the surveyor Durongoüet was tasked with tracing four surveyors' lines parallel to the shore, at altitudes of 100, 200, 400 and 600 m. These lines, which correspond to the topographic notion of level curves, are still visible today, especially above the centre of Saint-Pierre, in the southern part of the island.Today these are navigable roads lined with houses that form evocatively named towns away from the centre