Noise mapping of Rennes Métropole - type A isophonesCartographie du bruit sur Rennes Métropole - type a isophones

Cartographie du bruit sur Rennes Métropole - type a isophonesNoise mapping of Rennes Métropole - type A isophones

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This API provides isophone (noise contour) layers for Rennes Métropole, published by the metropolitan authority Rennes Métropole. It covers noise by source type, including road, rail, industrial and air traffic, measured over a 24-hour period (Lden) and at night (Ln). The rail network contours were updated in 2023 to reflect the commissioning of the new high-speed line (LGV) and metro line B. The dataset supports noise exposure assessment and urban planning at the local level within the metropolitan area.Couche d'isophones par typologie de bruit (routier, ferré, industriel et aérien) sur 24h (Lden) et la nuit (Ln). Les courbes d'isophones pour le réseau ferré ont été mises à jour en 2023 pour tenir compte de la mise en production de la nouvelle LGV et de la ligne B du métro.

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Trust score

How is this computed?

fair

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

Data schema (9 fields)

Filterable via the API (7)

gml_idobjectidfromtoperiodtypeannee

Click a field to see example values.

Field	Type	Description
geo_point_2dGeo Point	geo_point_2d	Geographic coordinates of the center point of the noise area.Geographic coordinates of the center point of the noise area.
geo_shapeShape	geo_shape	Polygon geometry outlining the noise contour area.Polygon geometry outlining the noise contour area.
gml_idGml id	text	Unique GML feature identifier for the noise contour.Unique GML feature identifier for the noise contour.
objectid	int	Internal record identifier.Internal record identifier.
from	double	Lower noise level bound of the isophone band, in decibels.Lower noise level bound of the isophone band, in decibels.
to	double	Upper noise level bound of the isophone band, in decibels.Upper noise level bound of the isophone band, in decibels.
period	text	Noise indicator period, either 24-hour (Lden) or nighttime (Ln).Noise indicator period, either 24-hour (Lden) or nighttime (Ln).
type	text	Noise source category, such as road, rail, industrial or air traffic.Noise source category, such as road, rail, industrial or air traffic.
annee	int	Year the noise contour data refers to.Year the noise contour data refers to.

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)

These rows are ODbL-1.0: share-alike. Reusing them obliges you to license any derived database on the same terms.

Record 1to: 120 · from: 75

{
  "to": 120,
  "from": 75,
  "type": "Routier",
  "annee": 2021,
  "gml_id": "bruit_isophone_2021.33286",
  "period": "Ln",
  "objectid": 33286,
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              -1.719191781946735,
              48.11942118130011
            ],
            [
              -1.719163297484354,
              48.11944226459172
            ],
            [
              -1.719115186623282,
              48.11943712020334
            ],
            [
              -1.719103319482864,
              48.119433912670814
            ],
            [
              -1.719100155838243,
              48.11942728422706
            ],
            [
              -1.719100300322737,
              48.119421511241704
            ],
            [
              -1.719105078349598,
              48.119369321550984
            ],
            [
              -1.719114102438282,
              48.119341467604
            ],
            [
              -1.719155615583747,
              48.1193392233689
            ],
            [
              -1.719211723677349,
              48.11930970753945
            ],
            [
              -1.719219158937424,
              48.119349771811606
            ],
            [
              -1.719221925992744,
              48.119357948402225
            ],
            [
              -1.719213110402879,
              48.119391020198734
            ],
            [
              -1.719205814634798,
              48.119408350438746
            ],
            [
              -1.719191781946735,
              48.11942118130011
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 48.11938189588619,
    "lon": -1.7191604371630314
  }
}

Record 2to: 55 · from: 50

{
  "to": 55,
  "from": 50,
  "type": "Routier",
  "annee": 2021,
  "gml_id": "bruit_isophone_2021.31773",
  "period": "Ln",
  "objectid": 31773,
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              -1.772913506143659,
              48.142895253515015
            ],
            [
              -1.772903626264064,
              48.14302263356601
            ],
            [
              -1.77286949780252,
              48.143014677608534
            ],
            [
              -1.772837634004282,
              48.14300500564372
            ],
            [
              -1.772687541197951,
              48.14295013522114
            ],
            [
              -1.772685614629594,
              48.142948232643626
            ],
            [
              -1.772685708295253,
              48.14294633637108
            ],
            [
              -1.772681137956954,
              48.142937694831204
            ],
            [
              -1.772724307752282,
              48.142928424507296
            ],
            [
              -1.772913506143659,
              48.142895253515015
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 48.14295415044503,
    "lon": -1.772826447950521
  }
}

Record 3to: 75 · from: 70

{
  "to": 75,
  "from": 70,
  "type": "Industriel",
  "annee": 2021,
  "gml_id": "bruit_isophone_2021.26799",
  "period": "Lden",
  "objectid": 26799,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 48.13224477433794,
    "lon": -1.628164952383887
  }
}

Record 4to: 120 · from: 75

{
  "to": 120,
  "from": 75,
  "type": "Routier",
  "annee": 2021,
  "gml_id": "bruit_isophone_2021.33374",
  "period": "Ln",
  "objectid": 33374,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 48.15542294283426,
    "lon": -1.5999472289110206
  }
}

Record 5to: 55 · from: 50

{
  "to": 55,
  "from": 50,
  "type": "Routier",
  "annee": 2021,
  "gml_id": "bruit_isophone_2021.31620",
  "period": "Ln",
  "objectid": 31620,
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              -1.756610843593208,
              48.099150535728604
            ],
            [
              -1.756614756411662,
              48.099172541695225
            ],
            [
              -1.756616420459812,
              48.09919058561614
            ],
            [
              -1.756528489610331,
              48.09927136116899
            ],
            [
              -1.756523001585627,
              48.09929645953569
            ],
            [
              -1.756461954575733,
              48.09934782700979
            ],
            [
              -1.756414176175323,
              48.09938990442548
            ],
            [
              -1.756383213036247,
              48.0994115512256
            ],
            [
              -1.756331943359924,
              48.09945224113662
            ],
            [
              -1.756292363702493,
              48.09947965123534
            ],
            [
              -1.756265158276509,
              48.099480776910596
            ],
            [
              -1.756249925327373,
              48.09948627331754
            ],
            [
              -1.756228350623664,
              48.09949302336784
            ],
            [
              -1.756222871798345,
              48.099455492590785
            ],
            [
              -1.756221726725472,
              48.09945328713737
            ],
            [
              -1.756222721627812,
              48.099354662024545
            ],
            [
              -1.756266598225592,
              48.099303824920725
            ],
            [
              -1.756295472549871,
              48.09926973883072
            ],
            [
              -1.756321787560994,
              48.09923999395496
            ],
            [
              -1.756385095352465,
              48.09917375442454
            ],
            [
              -1.756421883187062,
              48.09914087277597
            ],
            [
              -1.756548021717635,
              48.099131598197516
            ],
            [
              -1.756610843593208,
              48.099150535728604
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 48.099292218249055,
    "lon": -1.7563991641110697
  }
}

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

Verification Status

Using the API

Configuration

Base URL: https://data.rennesmetropole.fr/api/explore/v2.1/catalog/datasets/cartographie-du-bruit-2021-sur-rennes-metropole-type-a-isophones0

License

Open Data Commons Open Database License 1.0Open

✓ Redistributable
✓ Attribution required

Query examples

curl -s 'https://data.rennesmetropole.fr/api/explore/v2.1/catalog/datasets/cartographie-du-bruit-2021-sur-rennes-metropole-type-a-isophones0/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

7 000 req/day

per ipmeasured

observed 3 days ago

Dataset

Volume & freshness

Records

8.1k

8091

Last upstream update

4 days ago

2026-10-22

License

No license declared upstream.

○ Documentation○ Data dictionary○ Versioning

Source: opendatasoft

Machine-readable & source

JSON

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