Noise Directive (DF4 and DF8): Strategic acoustic maps of agglomerations - air traffic, LN index, 2017

The collection contains acoustic maps for agglomerations with a population exceeding 100 thousand people. The data shall include information on areas exposed to a specific noise level caused by air traffic for the LN indicator (night noise indicator). The data were compiled by presidents of cities with more than 100,000 inhabitants. The data were subject to reporting to the European Commission in 2017, in accordance with the provisions of Directive 2002/49/EC (DF 4 and DF 8) - the Noise Directive. The data provided to the European Commission was updated in October 2018. The maps are updated every 5 years. 'LN' (night noise indicator) means the long-term average sound level A, expressed in decibels (dB), determined in accordance with ISO 1996-2: 1987 during all the seasons of the night (understood as the time interval from 10:00 a.m. to 4:00 p.m.) 10 p.m. to 10 p.m. 6.00) in the year (understood as the calendar year in question in terms of sound emissions and the average year in terms of meteorological conditions); This indicator is used to determine a sleep disorder. The data layer shall be representative of the regional annual situation.