Aggregation tables generic noise zones type C index Lden in Hérault

Aggregation of generic tables describing Noise Zones, for all terrestrial infrastructures, map type C and Lden index. Limit value exceedance cards (or " type c & quot cards;) cards to be made within the framework of the CBS pursuant to Article 3-II-1°-c of the decree of 24 March 2006. This is a dataset representing for the year of mapping the areas where limit values in Lden are exceeded. Lden sound level indicator meaning Level Day-Evening-Night. It corresponds to an equivalent 24-hour sound level in which evening and night noise levels are increased by 5 and 10 dB(A) respectively to reflect greater discomfort during these periods. Aggregation obtained by the QGIS MIZOGEO plugin made available by CEREMA. Source of data by infrastructure: 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 l' index Ln.The isophone curves, described by the resource N_BRUIT_ISOPHONE_L thus serve to delimit the external borders and, where appropriate, internal noise zones by range of #x27; indices. __Partner organisations__ DDTM Hérault __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-c862c62c-ed0c-439d-8490-70bc8e1a171c) * [COVADIS data standard: Table describing Noise Areas of (to be completed)(http://geostandards.developpement-durable.gouv.fr/afficherPageStandard.do?jeu=N_BRUIT_ZBR_INFRA_S) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/da8f58396277e1bd01b5df866ef4a077f923090f)