Roads (within agglomerations) Noise Contours Lden Round 2
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Data indicating the level of noise according to the strategic noise mapping of all road sources within areas with a population of at least 100,000 people (agglomerations). Lden indicates a 24 hour...
本数据集为针对人口不少于10万的聚居区内全部道路噪声源开展战略噪声制图所得的噪声水平数据。Lden（昼夜等效噪声级）表征的是24小时的……
