Simple download service (Atom) of the dataset: Type A map of noise-exposed areas (day) for the Côte-d’Or road network

These maps also referred to as “type A maps” represent for the year 2017 in the form of isophone curves, the areas exposed to more than 50 dB(A) according to the Ln indicator, with a step of 5 in 5 dB(A). They concern the road network of Côte-d’Or. Geographic objects have been aggregated and cut together to avoid overlap. Lden: sound level indicator means Level Day-Evening-Night. It corresponds to an equivalent 24-hour sound level in which evening and night noise levels are increased by 5 and 10 dB(A), respectively, to reflect greater discomfort during these periods. These aggregated data are published for use in mapping purposes. It is advisable to load the detail data for more accurate use.此类地图亦称为“A型地图”，以等声线（isophone curves）形式呈现了2017年依据Ln指标、声压级超过50 dB(A)的区域，且以5 dB(A)为分级步长。 本数据覆盖科多尔省（Côte-d’Or）的道路路网。 为避免出现重叠问题，已对地理要素进行聚合与裁切处理。 Lden（昼夜等效声级）：该声级指标全称为Level Day-Evening-Night（昼夜-晚间-夜间声级），指将晚间与夜间的噪声级分别提升5 dB(A)与10 dB(A)后的等效24小时声级，用以体现该时段内噪声带来的更强不适感。 本套聚合后的数据已公开发布，仅供绘图制图使用。若需开展更精准的应用，建议加载详细数据集。