Areas exposed to noise from the county road 938 in Thouars at night (Ln) in Deux-Sèvres

The European Directive on Strategic Noise Maps requires at least the representation of global 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 represents areas exposed to noise from land transport infrastructure at night (Ln) at l' using isophone curves plotted by 5 dB(A) steps from 50 dB(A). The road concerned is Helensburgh Boulevard in Thouars The Ln is the average sound level that isolates the night period (22h-6h). It may be associated with the risk of sleep disturbances. Articles L572-1 to 11 of the Code de l' Environment laying down various provisions of; adaptation to Community law in the field of the Environment and the texts of #x27; Applications (Decree No 2006-361 of 24 March 2006, Decree of 4 April 2006 and Circular of 7 June 2007 on the issue of noise maps and noise prevention plans in the field of environment) provide for the indicators, methods of calculation to be used and results I'm waiting. __Origin__ This table is rendered geometrically using the IAL perimeter (prescription perimeter when the PPR is prescribed or perimeter regulated when the PPR is approved).The geometry of the prescribed perimeter of {\#x27; a PPR is provided by the prefectural prescription order of this PPR. The geometry of the regulated perimeter of a PPR is constructed by l' geometric aggregation of polygons representing the zones restricted by the PPR.Source of georeferencing:- cadastral reference PCI (DGFIP) or BD Parcellar (IGN) name, version and news to be specified- Scan25 (IGN): number and year of l' edition to be specified- BD CARTO (IGN) or GeoFLA (IGN) (number and year of l' edition to be specified) for prescribed PPRs — List of prescribed and approved PPRTs on the department based on existing information in the; GASPAR application for monitoring PPR procedures. __Partner organisations__ DDT Deux-Sèvres __Links annexes__ * [XML metadata view](http://ogc.geo-ide.developpement-durable.gouv.fr/csw/all-dataset?REQUEST=GetRecordById&SERVICE=CSW&VERSION=2.0.2&RESULTTYPE=results&elementSetName=full&TYPENAMES=gmd:MD_Metadata&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ID=fr-120066022-jdd-95c63dd6-101e-47d4-a9b0-960d67d9ddcd) * [COVADIS data standard: PPRT document on the department...](http://geostandards.developpement-durable.gouv.fr/afficherPageStandard.do?jeu=N_DOCUMENT_PPRT_S) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/204fa05d808ccf0bdeb53cd5c8b4b15ec48681f5)