Map Viewing Service (WMS) of the dataset: Areas exposed to the noise of the Thouars 24-hour communal lanes (Lden) in Deux-Sèvres

The European Directive on Strategic Noise Maps requires as a minimum the representation of the overall noise indicators Lden and Ln, for each source. These indicators correspond to the incident noise on the facades. The indicators represented are expressed in dB(A) and reflect a notion of overall discomfort or health risk. The data in this data set are related to the Lden indicator. “Lden" is an indicator of the overall noise level during a day (day, evening and night) used to qualify the discomfort associated with exposure to noise. It is calculated from the indicators "Lday", "Levening", "Lnight", "average noise levels over the periods 6h-18h, 18h-22h and 22h-6h. These are more precisely the isophone curves drawn in steps of 5 dB(A) from 55 dB(A). The data here concerns various routes, including the Avenue Emile Zola in Thouars. Articles L572-1 to 11 of the Environmental Code laying down various provisions for adaptation to Community law in the field of the environment and the implementing texts (Decree No 2006-361 of 24 March 2006, decree of 4 April 2006 and circular of 7 June 2007 on the drawing up of noise maps and plans for the prevention of environmental noise) provide for the indicators, the calculation methods to be used and the expected results. The data for this lot have been collected in accordance with these texts.