Map Viewing Service (WMS) of the dataset: Type A map of areas exposed to noise (night) for the Côte-d’Or rail network

Noise zones are geometric elements of the strategic noise map.
For type A maps (CBSTYPE), each noise zone is usually bounded by 2 isophone curves (Lden 55-60, 60-65, 65-70, 70-75 and Ln 50-55, 55-60, 60-65, 65-70) or by the lower limit isophone curve (Lden >75, Ln > 70).
For type C maps (CBSTYPE), each noise zone shall be bounded by the lower limit isophone curve (Lden > 68 or 73, Ln > 62 or 65).