data download service (WFS) from: Strategic noise map (first deadline) — Map type a — Ln

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 “a” map locates the noise-exposed areas, using Ln isophones per step from 5 in 5 from 50 dB(A) to more than 70 dB(A). Ln (Level night) is an index of hour-weighted noise discomfort (night noise) 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_ROUTES C_L_ISOPHONES_Ln70 C_COMMUNE_Labels C_ROUTES_Labels C_L_ISOPHONES_Ln60 C_DEPARTMENT C_COMMUNE C_L_ISOPHONES_Ln65 C_COMMUNES_IMPACTEES_A_LN C_L_ISOPHONES_Ln50 C_L_ISOPHONES_Ln55