Road noise zone for Type A maps Lden indicator for the 3 rd deadline in Maine-et-Loire(49)

Aggregation of generic tables describing Noise Zones, for an infrastructure, type d' infrastructure concerned ROUTE (R), map of type A according to l' indicator Lden (day/evening/night). This map is a graphical representation locating areas exposed to noise at l' using isophone curves ranging from 55 dB to 75 dB and more, by step of 5 dB. Map to be made as part of the CBS in accordance with Articles R.571-37 and R.571-38 of the code de l'environment. Aggregation obtained by the QGIS MIZOGEO plugin made available by CEREMA. __Origin__ The noise levels emitted by a given infrastructure during an average day are evaluated using numerical models producing isophone curves translated into noise zones, according to the index recommended for all modes of transport at European level, namely the Lden index and the Ln index. The isophone curves, described by the resource N_BRUIT_ISOPHONE_L, are thus used to delimit the external and, where appropriate, internal boundaries of noise zones by ranges of d' indices. Aggregation obtained by the QGIS MIZOGEO plugin made available by CEREMA. __Partner organisations__ DDT 49 (Departmental Directorate of the Territories of Maine-et-Loire), DDT 49/Service Water Environment Forest, DDT 49/Mission Sustainable Development and Knowledge of the Territories __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-dab619ce-7ed4-4d26-8dce-783e85254fd3) * [mapping-of-noise-of-big-infrastructure-r242.html](http://www.maine-et-loire.gouv.fr/cartographie-du-bruit-des-grandes-infrastructures-r242.html) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/4afaad2aa2cd5d85ffedc6cd9ee7e2e9ad4de449)