Road Noise Map (Ln)Carte du bruit routier (LN)

Carte du bruit routier (LN)Road Noise Map (Ln)

APIExecutable4/7Query nowOpen workbench Subscribe🇫🇷France

This API provides access to the road noise map for the Toulouse Métropole area in France, showing the Ln indicator, which represents the average night-time sound level measured between 10 p.m. and 6 a.m. It is published via the Toulouse Métropole open-data portal. According to the source description, the underlying data feed is currently experiencing an issue that is being worked on, which may affect availability or completeness of the data at present.Carte du bruit routier LN Ln (Level night) désigne le niveau sonore moyen mesuré pendant la nuit (de 22h à 6h) La source de données rencontre un problème que nous tachons de résoudre.

environment

⬇ Export CSV List records Select & filter Run verified request Read the docs

Trust score

How is this computed?

fair

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

Data schema (8 fields)

Filterable via the API (6)

gml_idcategoryoidsourceaction_corrdserreur_corrds

Click a field to see example values.

Field	Type	Description
geo_point_2dGeo Point	geo_point_2d	Geographic coordinates (latitude and longitude) of the location.Geographic coordinates (latitude and longitude) of the location.
geo_shapeShape	geo_shape	Geometric shape representing the area affected by road noise.Geometric shape representing the area affected by road noise.
gml_idGml id	text	Unique GML identifier for the geographic feature.Unique GML identifier for the geographic feature.
category	text	Night noise level (Lnight) category or threshold band in decibels.Night noise level (Lnight) category or threshold band in decibels.
oid	int	Internal numeric object identifier for the record.Internal numeric object identifier for the record.
source	text	Type of road source, e.g. roads within an agglomeration.Type of road source, e.g. roads within an agglomeration.
action_corrdsAction corrds	text	Action taken regarding coordinate correction for this record.Action taken regarding coordinate correction for this record.
erreur_corrdsErreur corrds	text	Error noted, if any, concerning the record's coordinates.Error noted, if any, concerning the record's coordinates.

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.

Where=

Sort by

Sample data (5 records)

Record 1oid: 1101 · gml_id: _c3ec1b45-cb87-11f1-912b-953db77fdd9b.11

{
  "oid": 1101,
  "gml_id": "_c3ec1b45-cb87-11f1-912b-953db77fdd9b.1101",
  "source": "roadsInAgglomeration",
  "category": "Lnight5054",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              1.344903945415238,
              43.5283310623362
            ],
            [
              1.344877404481859,
              43.52831051557721
            ],
            [
              1.344846437126922,
              43.52833005779137
            ],
            [
              1.344875510851038,
              43.52838044010258
            ],
            [
              1.344903945415238,
              43.5283310623362
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 43.52834049552645,
    "lon": 1.3448754790030324
  },
  "action_corrds": "aucune action",
  "erreur_corrds": null
}

Record 2oid: 2517 · gml_id: _c3ec1b45-cb87-11f1-912b-953db77fdd9b.25

{
  "oid": 2517,
  "gml_id": "_c3ec1b45-cb87-11f1-912b-953db77fdd9b.2517",
  "source": "roadsInAgglomeration",
  "category": "Lnight6064",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              1.370285244043426,
              43.55355292095451
            ],
            [
              1.370259078835143,
              43.553531485518015
            ],
            [
              1.370217686583886,
              43.5535518776206
            ],
            [
              1.370257723329465,
              43.55356837729282
            ],
            [
              1.370285244043426,
              43.55355292095451
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 43.55355071881504,
    "lon": 1.370253808756138
  },
  "action_corrds": "aucune action",
  "erreur_corrds": null
}

Record 3oid: 24010 · gml_id: _c3ec1b45-cb87-11f1-912b-953db77fdd9b.24

{
  "oid": 24010,
  "gml_id": "_c3ec1b45-cb87-11f1-912b-953db77fdd9b.24010",
  "source": "roadsInAgglomeration",
  "category": "Lnight6064",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              1.461715648744645,
              43.66374715827123
            ],
            [
              1.461592039888072,
              43.66373642276294
            ],
            [
              1.461468031470991,
              43.663741525534945
            ],
            [
              1.461437776030863,
              43.663775871409605
            ],
            [
              1.461466968886549,
              43.6637836413128
            ],
            [
              1.461590207757959,
              43.66380904548412
            ],
            [
              1.461713796330336,
              43.66382059091292
            ],
            [
              1.461837707280405,
              43.663819357490006
            ],
            [
              1.461893327981384,
              43.663782287973966
            ],
            [
              1.461838962553668,
              43.66376959247556
            ],
            [
              1.461715648744645,
              43.66374715827123
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 43.663778982889035,
    "lon": 1.461661883017022
  },
  "action_corrds": "aucune action",
  "erreur_corrds": null
}

Record 4oid: 16224 · gml_id: _c3ec1b45-cb87-11f1-912b-953db77fdd9b.16

{
  "oid": 16224,
  "gml_id": "_c3ec1b45-cb87-11f1-912b-953db77fdd9b.16224",
  "source": "roadsInAgglomeration",
  "category": "Lnight5054",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              1.523194517716709,
              43.55502082355542
            ],
            [
              1.523155848350791,
              43.55499215175365
            ],
            [
              1.523067559426555,
              43.55501911014644
            ],
            [
              1.523126636665049,
              43.55510988908534
            ],
            [
              1.523152680709862,
              43.55512318548775
            ],
            [
              1.523178608862545,
              43.555110553630755
            ],
            [
              1.523194517716709,
              43.55502082355542
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 43.55505218886878,
    "lon": 1.5231405495736956
  },
  "action_corrds": "aucune action",
  "erreur_corrds": null
}

Record 5oid: 15276 · gml_id: _c3ec1b45-cb87-11f1-912b-953db77fdd9b.15

{
  "oid": 15276,
  "gml_id": "_c3ec1b45-cb87-11f1-912b-953db77fdd9b.15276",
  "source": "roadsInAgglomeration",
  "category": "Lnight6569",
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              1.441106103151715,
              43.575679244482174
            ],
            [
              1.441103875061026,
              43.575679214419765
            ],
            [
              1.440982444121868,
              43.57567757595468
            ],
            [
              1.440980149027183,
              43.57576747942068
            ],
            [
              1.441103803644564,
              43.575769327937486
            ],
            [
              1.441106096260096,
              43.57567951446257
            ],
            [
              1.441106103151715,
              43.575679244482174
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 43.575723407253165,
    "lon": 1.4410431455953663
  },
  "action_corrds": "aucune action",
  "erreur_corrds": null
}

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

Verification Status

Using the API

Configuration

Base URL: https://data.toulouse-metropole.fr/api/explore/v2.1/catalog/datasets/isoph-routier-ln

Query examples

curl -s 'https://data.toulouse-metropole.fr/api/explore/v2.1/catalog/datasets/isoph-routier-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

100 000 req/day

per ipmeasured

observed 3 days ago

Dataset

Volume & freshness

Records

27k

27329

Last upstream update

4 days ago

2026-10-19

License

No license declared upstream.

○ Documentation○ Data dictionary○ Versioning

Source: opendatasoft

Machine-readable & source

JSON

Embed this badge in a README or wiki — it always shows the latest verification state and quality tier.