Railway Noise Ln Type A MapBruit ferroviaire Ln de type A

Bruit ferroviaire Ln de type ARailway Noise Ln Type A Map

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This API provides access to a dataset mapping railway noise levels across the Aix-Marseille-Provence Metropolitan Area, based on the Ln (night-time) noise indicator using type A isophone maps. It is published and maintained by the Métropole Aix-Marseille-Provence as part of its local noise observatory. The data can be used to assess night-time noise exposure from rail traffic in the metropolitan area, supporting urban planning, environmental monitoring, and public information on noise pollution near railway infrastructure.Bruit ferroviaire selon l'indicateur Ln carte de type A sur la Métropole Aix-Marseille Provence

environment

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Trust score

How is this computed?

fair

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Data schema (17 fields)

Filterable via the API (15)

idnom_donneecodeinseecodectcodecommdatemajsourceanneecodedeptautoriteidcourbetypesourceindicetypeisophonevalidedeb

Click a field to see example values.

Fill	Field	Type	Description
—	geo_point_2dGeo Point	geo_point_2d	Geographic center point coordinates of the feature.Geographic center point coordinates of the feature.
—	geo_shapeShape	geo_shape	Polygon geometry outlining the noise level zone.Polygon geometry outlining the noise level zone.
—	id	double	Unique numeric identifier for the record.Unique numeric identifier for the record.
—	nom_donneeNom donnee	text	Name of the dataset, indicating railway noise data.Name of the dataset, indicating railway noise data.
—	codeinsee	text	INSEE code identifying the municipality.INSEE code identifying the municipality.
—	codect	text	Code identifying the noise source category or track section.Code identifying the noise source category or track section.
—	codecomm	text	Commune code identifying the municipality.Commune code identifying the municipality.
—	datemaj	text	Date the record was last updated.Date the record was last updated.
—	source	text	Organization or company that produced the noise data.Organization or company that produced the noise data.
—	annee	text	Year the noise data was produced.Year the noise data was produced.
100%	codedept	text	Code identifying the administrative department.Code identifying the administrative department.
100%	autorite	text	Identifier (e.g. SIREN) of the responsible authority.Identifier (e.g. SIREN) of the responsible authority.
100%	idcourbe	double	Unique identifier of the noise contour curve.Unique identifier of the noise contour curve.
100%	typesource	text	Type of noise source, coded as a letter.Type of noise source, coded as a letter.
100%	indicetype	text	Type of noise indicator used, e.g. Ln.Type of noise indicator used, e.g. Ln.
100%	isophone	double	Noise level threshold in decibels for this contour.Noise level threshold in decibels for this contour.
100%	validedeb	text	Start date from which the data is considered valid.Start date from which the data is considered valid.

Schema captured from opendatasoft 3 days ago.

Query the data

Pick columns and a sort, then fetch a live preview straight from the source. Choose an API-filterable column (marked ▾) under “Where” to pick from its list of values.

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Sample data (5 records)

Record 1id: 672 · annee: 2022

{
  "id": 672,
  "annee": "2022",
  "codect": "CT3",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "31/05/2022",
  "autorite": "814 732 707",
  "codecomm": "132049",
  "codedept": "13",
  "idcourbe": 672,
  "isophone": 50,
  "codeinsee": "13049",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.094715231264247,
            43.69940603564743
          ],
          [
            5.094575092294215,
            43.69917431569752
          ],
          [
            5.094437219568309,
            43.69928563786947
          ],
          [
            5.094538598695237,
            43.69937772294616
          ],
          [
            5.094451283119225,
            43.699493516767184
          ],
          [
            5.094611426473942,
            43.69948852807304
          ],
          [
            5.094715231264247,
            43.69940603564743
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "31/05/2022",
  "indicetype": "Ln",
  "nom_donnee": "BRUIT_FERROVIAIRE",
  "typesource": "A",
  "geo_point_2d": {
    "lat": 43.699353493034316,
    "lon": 5.09457459339921
  }
}

Record 2id: 716 · annee: 2022

{
  "id": 716,
  "annee": "2022",
  "codect": "CT2",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "31/05/2022",
  "autorite": "814 732 707",
  "codecomm": "132117",
  "codedept": "13",
  "idcourbe": 716,
  "isophone": 50,
  "codeinsee": "13117",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.234900149354,
            43.45016117513229
          ],
          [
            5.234889184445164,
            43.450140019963584
          ],
          [
            5.234804766935882,
            43.45018187263243
          ],
          [
            5.234895794460333,
            43.45017107647281
          ],
          [
            5.234909478691986,
            43.4501630378329
          ],
          [
            5.234900149354,
            43.45016117513229
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "31/05/2022",
  "indicetype": "Ln",
  "nom_donnee": "BRUIT_FERROVIAIRE",
  "typesource": "A",
  "geo_point_2d": {
    "lat": 43.45016391455392,
    "lon": 5.234866453928131
  }
}

Record 3id: 72 · annee: 2022

{
  "id": 72,
  "annee": "2022",
  "codect": "CT1",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "31/05/2022",
  "autorite": "814 732 707",
  "codecomm": "131028",
  "codedept": "13",
  "idcourbe": 72,
  "isophone": 70,
  "codeinsee": "13028",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.631905660490204,
            43.20365742215662
          ],
          [
            5.631898765825888,
            43.20364435623669
          ],
          [
            5.631877720268538,
            43.20366024256172
          ],
          [
            5.631876439573513,
            43.20367185737196
          ],
          [
            5.631890156359293,
            43.20368113193896
          ],
          [
            5.631904026119464,
            43.20367884502011
          ],
          [
            5.631905660490204,
            43.20365742215662
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "31/05/2022",
  "indicetype": "Ln",
  "nom_donnee": "BRUIT_FERROVIAIRE",
  "typesource": "A",
  "geo_point_2d": {
    "lat": 43.20366485494676,
    "lon": 5.631892547471852
  }
}

Record 4id: 360 · annee: 2022

{
  "id": 360,
  "annee": "2022",
  "codect": "CT1",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "31/05/2022",
  "autorite": "814 732 707",
  "codecomm": "131216",
  "codedept": "13",
  "idcourbe": 360,
  "isophone": 55,
  "codeinsee": "13216",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.308177248337202,
            43.36465159310065
          ],
          [
            5.308188839213849,
            43.36464688218999
          ],
          [
            5.308211367020772,
            43.364632119807574
          ],
          [
            5.30817940245001,
            43.36458572397755
          ],
          [
            5.308143158144206,
            43.364591207362565
          ],
          [
            5.308121604226247,
            43.36459479904501
          ],
          [
            5.308119525221969,
            43.36459584774924
          ],
          [
            5.308113014785045,
            43.3645976876927
          ],
          [
            5.308068153830882,
            43.36461624377233
          ],
          [
            5.308055922537987,
            43.364620903184345
          ],
          [
            5.308020972671288,
            43.364650954957504
          ],
          [
            5.30797636848077,
            43.3646639435468
          ],
          [
            5.30795744392097,
            43.36467214391442
          ],
          [
            5.307940370009073,
            43.364675078604115
          ],
          [
            5.307889940042068,
            43.3646885325514
          ],
          [
            5.307874910380121,
            43.36469095800255
          ],
          [
            5.307821311062839,
            43.364709597574596
          ],
          [
            5.307813459706433,
            43.36471074800014
          ],
          [
            5.307811018689551,
            43.364718736389584
          ],
          [
            5.307816888554743,
            43.36472206108308
          ],
          [
            5.307822495225087,
            43.36472152085107
          ],
          [
            5.30782518176993,
            43.36472046086198
          ],
          [
            5.307895009644109,
            43.364711437979736
          ],
          [
            5.307901009576975,
            43.36470896405542
          ],
          [
            5.307966003411436,
            43.364697265938474
          ],
          [
            5.307973480984355,
            43.36469423775257
          ],
          [
            5.308036862446662,
            43.3646832024331
          ],
          [
            5.308046203500781,
            43.364679374365096
          ],
          [
            5.308107404483326,
            43.364668785001015
          ],
          [
            5.308118919520882,
            43.364664082560836
          ],
          [
            5.308177248337202,
            43.36465159310065
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "31/05/2022",
  "indicetype": "Ln",
  "nom_donnee": "BRUIT_FERROVIAIRE",
  "typesource": "A",
  "geo_point_2d": {
    "lat": 43.364652547536586,
    "lon": 5.308055760840291
  }
}

Record 5id: 210 · annee: 2022

{
  "id": 210,
  "annee": "2022",
  "codect": "CT2",
  "source": "IMPEDANCE INGENIERIE",
  "datemaj": "31/05/2022",
  "autorite": "814 732 707",
  "codecomm": "132001",
  "codedept": "13",
  "idcourbe": 210,
  "isophone": 60,
  "codeinsee": "13001",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "Polygon",
      "coordinates": [
        [
          [
            5.433820781384055,
            43.526813612929885
          ],
          [
            5.433813735606181,
            43.5268077085243
          ],
          [
            5.433805951355793,
            43.52680770236589
          ],
          [
            5.433792582105383,
            43.52681265637099
          ],
          [
            5.433791023388373,
            43.52682835702256
          ],
          [
            5.433789901377839,
            43.526830571539456
          ],
          [
            5.433794504950018,
            43.526833625990214
          ],
          [
            5.433798419205926,
            43.52683368100055
          ],
          [
            5.433805114722994,
            43.526831097636304
          ],
          [
            5.433818693383448,
            43.526817610745525
          ],
          [
            5.433820781384055,
            43.526813612929885
          ]
        ]
      ]
    },
    "properties": {}
  },
  "validedeb": "31/05/2022",
  "indicetype": "Ln",
  "nom_donnee": "BRUIT_FERROVIAIRE",
  "typesource": "A",
  "geo_point_2d": {
    "lat": 43.52681969726921,
    "lon": 5.433803773585682
  }
}

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/fr-observatoire-du-bruit-bruit_isophone_ferroviaire_a_ln

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/fr-observatoire-du-bruit-bruit_isophone_ferroviaire_a_ln/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 3 days ago

Dataset

Volume & freshness

Records

1.0k

1001

Last upstream update

2 years ago

2025-04-24

License

No license declared upstream.

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Source: opendatasoft

Machine-readable & source

JSON

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