data download service (WFS) from: Strategic noise map (first deadline) — Type c map — Lden 73 (for railways)

The strategic noise maps, in accordance with European Directive 2002/49/EC of 25 June 2002, allow for the overall assessment of exposure to noise in the environment. They allow a representation of noise levels, but also to enumerate the exposed population, quantify the nuisances, and then draw up action plans. The type “c” map represents the isophone curves of the areas where the Lden exceeds the value of 73 dB(A) for railways. Lden 73 dB(A): zone where the Lden (Level day, evening, night) exceeds the value of 73 dB(A) DB(A) is a unit of measurement expressing a level of intensity (decibel) weighted according to the physiological characteristics of the human ear. Reference: prefectural Decree of 25 May 2011 MAXIMUM CONSULTATION SCALE: 1/25 000 th C_COMMUNES_IMPACTEES_C_LDEN73 C_L_LIMITE_LDen_73_S_037_Values_dBInf C_DEPARTMENT C_COMMUNE C_COMMUNE_Labels本数据集包含依据2002年6月25日发布的欧盟指令2002/49/EC制定的战略噪声地图，可用于全面评估环境噪声暴露情况。此类地图不仅能够呈现噪声级分布，还可统计受噪声影响的人口数量、量化噪声扰民程度，并据此制定噪声治理行动计划。 C型地图展示了铁路沿线等效昼夜噪声级（Lden）超过73 dB(A)区域的等声级曲线。 Lden 73 dB(A)：指等效昼夜噪声级（Lden）超过73 dB(A)的区域。dB(A)是依据人类耳部生理特性加权的声强测量单位（分贝）。 参考依据：2011年5月25日发布的省级政令。 最大咨询比例尺：1/25000 C_COMMUNES_IMPACTEES_C_LDEN73 C_L_LIMITE_LDen_73_S_037_Values_dBInf C_DEPARTMENT C_COMMUNE C_COMMUNE_Labels