Road Traffic Noise – Exposed Areas over 24 Hours (Lden Indicator)Bruit routier - Zones exposées, sur 24h (indicateur Lden)

Bruit routier - Zones exposées, sur 24h (indicateur Lden)Road Traffic Noise – Exposed Areas over 24 Hours (Lden Indicator)

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This dataset presents strategic noise mapping of road traffic exposure across the Aix-Marseille-Provence metropolitan area, expressed using the Lden indicator, which aggregates day-evening-night noise levels over a 24-hour period. It was produced by the engineering firm Impédance Ingénierie on behalf of Métropole Aix-Marseille-Provence. The mapped geographic shapes have been simplified for publication. The data supports assessment of areas exposed to road noise pollution as part of the metropolitan authority's strategic noise mapping obligations, and is published with a restriction against redistribution.--------------------------Ce jeu ne doit pas être republié ------------------ (voir commentaire dans la partie Admin) Cartographie de Bruit Stratégique Donnée produite par Impédance ingénierie pour le compte de la métropole Aix-Marseille Provence Sur la carte, les formes géographiques ont été sim...

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Trust score

How is this computed?

fair

Weighted across five axes. Tap a ring for what it measures.

Data schema (20 fields)

Filterable via the API (18)

codectnom_communeidnom_donneecodeinseecodecommdatemajsourceanneecodedeptautoriteidcourbetypesourceindicetypeisophonevalidedebst_area_shst_perimet

Click a field to see example values.

Fill	Field	Type	Description
99.9%	codect	text	Territorial sector code (CT) of the metropolis.Territorial sector code (CT) of the metropolis.
97.4%	nom_communeCommune name	text	Name of the municipality.Name of the municipality.
100%	geo_shapeShape	geo_shape	Geographic polygon shape of the noise exposure zone.Geographic polygon shape of the noise exposure zone.
100%	id	double	Unique numeric identifier of the record.Unique numeric identifier of the record.
100%	nom_donneeNom donnee	text	Name of the dataset describing the noise study.Name of the dataset describing the noise study.
99.9%	codeinsee	text	INSEE code of the municipality.INSEE code of the municipality.
99.9%	codecomm	text	Municipality code.Municipality code.
100%	datemaj	text	Date the record was last updated.Date the record was last updated.
100%	source	text	Organization that produced the data.Organization that produced the data.
100%	annee	text	Year the data refers to.Year the data refers to.
—	codedept	text	Department code.Department code.
—	autorite	text	SIREN identifier of the responsible authority.SIREN identifier of the responsible authority.
—	idcourbe	double	Identifier of the noise contour curve.Identifier of the noise contour curve.
—	typesource	text	Type of noise source (e.g. road category).Type of noise source (e.g. road category).
—	indicetype	text	Type of noise indicator used (e.g. Lden).Type of noise indicator used (e.g. Lden).
—	isophone	double	Noise level threshold in decibels for the contour.Noise level threshold in decibels for the contour.
—	validedeb	text	Start date of validity for the record.Start date of validity for the record.
—	st_area_shSt area sh	double	Area of the zone shape, in square meters.Area of the zone shape, in square meters.
—	st_perimetSt perimet	double	Perimeter length of the zone shape, in meters.Perimeter length of the zone shape, in meters.
—	geo_point_2dCoordinates	geo_point_2d	Geographic coordinates (latitude and longitude) of the zone.Geographic coordinates (latitude and longitude) of the zone.

Schema captured from opendatasoft 2 days ago.

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Sample data (5 records)

Record 1id: 23494 · annee: 2021

{
  "id": 23494,
  "annee": "2021",
  "codect": "CT2",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "11/06/2020",
  "autorite": "814 732 707",
  "codecomm": "132001",
  "codedept": "13",
  "idcourbe": 23494,
  "isophone": 60,
  "codeinsee": "13001",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.427698877247716,
            43.55929162770887
          ],
          [
            5.427644628127925,
            43.559331818101185
          ],
          [
            5.427692812287487,
            43.55937358824551
          ],
          [
            5.427747687113143,
            43.55934526599619
          ],
          [
            5.427698877247716,
            43.55929162770887
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "11/06/2021",
  "indicetype": "Lden",
  "nom_donnee": "Bruit routier type A LDEN - sur 24h (étude de bruit Impédance Ingénierie)",
  "st_area_sh": 53.635599984,
  "st_perimet": 27.2879151483,
  "typesource": "A",
  "nom_commune": "Aix-en-Provence",
  "geo_point_2d": {
    "lat": 43.55933461839557,
    "lon": 5.427696197309954
  }
}

Record 2id: 32230 · annee: 2021

{
  "id": 32230,
  "annee": "2021",
  "codect": "CT1",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "11/06/2020",
  "autorite": "814 732 707",
  "codecomm": "131211",
  "codedept": "13",
  "idcourbe": 32230,
  "isophone": 60,
  "codeinsee": "13211",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.475068819639302,
            43.28474096637222
          ],
          [
            5.475152511554392,
            43.28475632919281
          ],
          [
            5.475160243508388,
            43.28468676225243
          ],
          [
            5.475074815313186,
            43.28468547917628
          ],
          [
            5.475068819639302,
            43.28474096637222
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "11/06/2021",
  "indicetype": "Lden",
  "nom_donnee": "Bruit routier type A LDEN - sur 24h (étude de bruit Impédance Ingénierie)",
  "st_area_sh": 62.6543999976,
  "st_perimet": 30.6202834437,
  "typesource": "A",
  "nom_commune": "Marseille 11e  Arrondissement",
  "geo_point_2d": {
    "lat": 43.284717529008255,
    "lon": 5.475115687630726
  }
}

Record 3id: 3401 · annee: 2021

{
  "id": 3401,
  "annee": "2021",
  "codect": "CT2",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "11/06/2020",
  "autorite": "814 732 707",
  "codecomm": "131060",
  "codedept": "13",
  "idcourbe": 3401,
  "isophone": 55,
  "codeinsee": "13060",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.492529287506537,
            43.47385731526057
          ],
          [
            5.492480988563077,
            43.47388362962902
          ],
          [
            5.492622217233558,
            43.47387687138904
          ],
          [
            5.492604895469136,
            43.47385080585225
          ],
          [
            5.492529287506537,
            43.47385731526057
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "11/06/2021",
  "indicetype": "Lden",
  "nom_donnee": "Bruit routier type A LDEN - sur 24h (étude de bruit Impédance Ingénierie)",
  "st_area_sh": 50.5377999818,
  "st_perimet": 30.9087173882,
  "typesource": "A",
  "nom_commune": "Meyreuil",
  "geo_point_2d": {
    "lat": 43.47386844053582,
    "lon": 5.492559886533809
  }
}

Record 4id: 37563 · annee: 2021

{
  "id": 37563,
  "annee": "2021",
  "codect": "Null",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "11/06/2020",
  "autorite": "814 732 707",
  "codecomm": "Null",
  "codedept": "13",
  "idcourbe": 37563,
  "isophone": 65,
  "codeinsee": "Null",
  "geo_shape": "[large value omitted]",
  "validedeb": "11/06/2021",
  "indicetype": "Lden",
  "nom_donnee": "Bruit routier type A LDEN - sur 24h (étude de bruit Impédance Ingénierie)",
  "st_area_sh": 61684.3350501,
  "st_perimet": 10093.798993,
  "typesource": "A",
  "nom_commune": null,
  "geo_point_2d": {
    "lat": 43.32296320259709,
    "lon": 5.370381450922897
  }
}

Record 5id: 23658 · annee: 2021

{
  "id": 23658,
  "annee": "2021",
  "codect": "CT2",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "11/06/2020",
  "autorite": "814 732 707",
  "codecomm": "132001",
  "codedept": "13",
  "idcourbe": 23658,
  "isophone": 60,
  "codeinsee": "13001",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.446247220098516,
            43.608412137251165
          ],
          [
            5.446206134144347,
            43.608398659204894
          ],
          [
            5.446151516843025,
            43.608433916643044
          ],
          [
            5.4462370225857,
            43.60847223024481
          ],
          [
            5.446247220098516,
            43.608412137251165
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "11/06/2021",
  "indicetype": "Lden",
  "nom_donnee": "Bruit routier type A LDEN - sur 24h (étude de bruit Impédance Ingénierie)",
  "st_area_sh": 54.9631499831,
  "st_perimet": 27.9428037073,
  "typesource": "A",
  "nom_commune": "Aix-en-Provence",
  "geo_point_2d": {
    "lat": 43.60843248232137,
    "lon": 5.446209003713749
  }
}

Live sample captured at profiling time — values may have changed upstream.

Verification Status

Using the API

Configuration

Base URL: https://data.ampmetropole.fr/api/explore/v2.1/catalog/datasets/bruit-routier-type-a-lden-sur-24h-etude-de-bruit-impedance-ingenierie

License

Licence Ouverte 2.0 (France / Etalab)Open

✓ Redistributable
✓ Attribution required

Query examples

curl -s 'https://data.ampmetropole.fr/api/explore/v2.1/catalog/datasets/bruit-routier-type-a-lden-sur-24h-etude-de-bruit-impedance-ingenierie/records?limit=20' -H 'Accept: application/json'

First 20 records of the dataset as JSON.

Uses the Opendatasoft Explore v2.1 syntax — supports select, where, group_by and order_by.

Full API documentation ↗

Rate limits

5 000 req/day

per ipmeasured

observed 2 days ago

Dataset

Volume & freshness

Records

41k

41329

Last upstream update

7 months ago

2026-03-12

License

No license declared upstream.

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Source: opendatasoft

Machine-readable & source

JSON

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