Map Viewing Service (WMS) of the dataset: Noise zone of a strategic noise map of type C, associated index Lden, on the road network of Upper Corsica

Noise level zones describe a noise exposure situation based on a noise indicator or area affected by noise. They are used primarily for the preparation of strategic noise maps pursuant to Article R.572-5 of the Environmental Code.
Noise zones are geometric elements of the strategic noise map.
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).

噪声级区域（Noise level zones）是基于噪声指标或受噪声影响的范围，用以表征噪声暴露状况的地理要素。此类区域主要用于依据《环境法典》第R.572-5条编制战略噪声地图。
噪声区域为战略噪声地图的几何构成要素。
对于（CBSTYPE）C类地图，各噪声区域的边界均以下限等声级曲线划定，对应的阈值条件为Lden＞68或73、Ln＞62或65。