Map Viewing Service (WMS) of the dataset: Type A map of areas exposed to noise (Day-Soirée-Nnight) for the Côte-d’Or rail network
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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).
噪声区是战略噪声地图(strategic noise map)的几何要素。针对类型A地图(CBSTYPE),每个噪声区通常以两条等声级线(isophone curve)作为边界,涵盖昼夜等效声级(Lden)55~60、60~65、65~70、70~75,以及夜间等效声级(Ln)50~55、55~60、60~65、65~70的区间范围;或仅以最低限值等声级线作为边界,对应Lden>75、Ln>70的范围。针对类型C地图(CBSTYPE),每个噪声区必须以最低限值等声级线作为边界,对应Lden>68或73、Ln>62或65的范围。



