All Sources (within agglomerations) Noise Contours Lden Round 1

Data indicating the level of noise according to the strategic noise mapping of consolidated sources (roads, railways, airports and industry) within areas with a population of at least 250,000 people (agglomerations). Lden indicates a 24 hour annual average noise level with separate weightings for the evening and night periods. 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).