Map Viewing Service (WMS) of the dataset: Areas exposed to daytime noise of the Paris-Le Havre line (Lden index type A map)

European Directive 2002/49/EC of 25 June 2002 on the assessment and management of environmental noise entails for EU Member States an assessment of environmental noise in the vicinity of major transport infrastructure (land and air) and in large agglomerations. This assessment is carried out in particular through the development of strategic ‘so-called’ noise maps. These maps are intended to be reviewed and revised every 5 years. The first series were developed in 2007 (1st deadline) and 2012 (2nd maturity). 2017 is therefore the year of the 3 rd deadline. CBS are required, in particular, for rail infrastructure with more traffic than 30 000 train crossings per year.; For major road and rail transport infrastructure, the CBS shall be established, adopted and approved under the authority of the Prefect of the Department: the Noise Card Approval Order is dated November 16, 2018 Noise maps are developed according to the indicators established by the European Directive, namely Lden (Day Evening Night Level) and Ln (Night Level). • Day/day: [6h-18h] • Evening/evening: [18h-22h] • Night/night: [22h-6h] The Lden and Ln indicators correspond to a defined energy average over the periods (Day/Black/Night) for Lden and (Night) for Ln. The corresponding results are expressed in A or dB(A) weighted decibels. Areas exposed to noise (type A map): These are two cards representing • areas exposed to more than 55 dB(A) in Lden • areas exposed to more than 50 dB(A) in Ln They are presented in the form of isophone curves materialising areas of the same sound level and are plotted by step of 5 dB(A) from the threshold of 55 dB(A) in Lden and 50 dB(A) in Ln.2002年6月25日发布的《欧盟环境噪声评估与管理指令（2002/49/EC）》要求欧盟成员国对主要交通基础设施（陆路与航空）周边及大型聚居区的环境噪声开展评估。 此类评估主要通过编制战略性“所谓”噪声地图来实施。 此类地图需每5年进行一次复核与修订。首轮噪声地图分别于2007年（第一截止时限）与2012年（第二阶段）完成编制，因此2017年为第三截止时限的执行年份。 对于年列车通行量超过3万次的铁路基础设施，需编制噪声卡片（CBS）。 针对主要公路与铁路交通基础设施，噪声卡片（CBS）需在部门省长的权限范围内完成编制、采纳与核准：《噪声卡片核准令》的签发日期为2018年11月16日。 噪声地图需按照欧盟指令规定的指标进行编制，具体为Lden（昼间-晚间-夜间等效声级）与Ln（夜间等效声级）： • 昼间时段：[6时至18时] • 晚间时段：[18时至22时] • 夜间时段：[22时至次日6时] Lden指标为昼间、晚间与夜间时段的能量平均值，Ln指标为夜间时段的能量平均值。计算结果以A计权分贝（dB(A)）表征。 噪声暴露区域（A型噪声地图）包含两类表征对象：一是Lden指标超过55 dB(A)的区域，二是Ln指标超过50 dB(A)的区域。此类地图以等声级线（isophone curves）形式呈现，用于标示相同声级的区域，绘制步长为5 dB(A)，Lden的起始阈值为55 dB(A)，Ln的起始阈值为50 dB(A)。