data consultation service (WMS) from: Railways, noise chart type “a” index Ln (night)

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 (Level night) isophones in steps from 5 in 5 from 50 dB(A) to more than 70 dB(A). The Ln (Level night) is an indication of noise discomfort. DB(A) is a unit of measurement expressing a level of intensity (decibel) weighted according to the physiological characteristics of the human ear. ___ Access to the municipality is available in the “Location” tab on the left of the map. Maximum consultation scale: 1/25 000 th ___ Only the documents annexed to the Orders are authentic ___ Card background: BD CARTO, SCAN 25, SCAN REGIONAL and SCAN 1000 ®© IGN C_045_569000_LNA_Values_Id C_045_590000_LNA_Values_Id C_N_COMMUNE_BDC_045 C_045_570000_LNA_Values_Id