Industry (within agglomerations) Noise Contours Lnight Round 2

Data indicating the level of noise according to the strategic noise mapping of industrial sources within areas with a population of at least 100,000 people (agglomerations). Lnight indicates night time annual average noise level results in dB, where night is defined as 2300 - 0700. This data is a product of the strategic noise mapping analysis undertaken to meet the requirements of the Environmental Noise Directive (Directive 2002/49/EC).本数据集用于呈现人口不少于10万的集聚都市区（agglomerations）内，工业声源战略噪声映射（strategic noise mapping）所得的噪声等级。其中Lnight代表夜间年度平均噪声水平，单位为分贝（dB），夜间时段定义为23:00至次日07:00。本数据系为满足《环境噪声指令（Environmental Noise Directive，Directive 2002/49/EC）》的相关要求，通过战略噪声映射分析所生成的产物。