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Isophone curves representing the Lden noise indicator, drawn in steps of 5 dB(A) from 55 dB(A), for a full day along Avenue de Paris and Boulevard de l’Europe in Niort. The data was collected by the Bureau de Recherches Géologiques et Minières (BRGM) in accordance with the European Directive on Strategic Noise Maps and French implementing texts. The dataset was last updated on April 4, 2019.
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