Railway Noise Map (Ln)Carte du bruit ferroviaire (LN)
Carte du bruit ferroviaire (LN)Railway Noise Map (Ln)
This API provides access to a map of railway noise levels (in dB(A)) modeled for night-time exposure across the Toulouse Métropole area in France. The indicator Ln (Level night) represents the average noise level during the night period, resulting from rail traffic. Published as part of Toulouse Métropole's open data initiative, the dataset supports noise assessment, urban planning, and environmental studies related to rail infrastructure impact on nearby populations.Carte de l'environnement sonore ferroviaire (en dB(A)) calculée pour une exposition nocturne. Ln (Level night) correspond au bruit moyen au cours de la nuit.
Trust score
How is this computed?Weighted across five axes. Tap a ring for what it measures.
Data schema (3 fields)
Click a field to see example values.
| Field | Type | Description |
|---|---|---|
| geo_point_2dGeo Point | geo_point_2d | Latitude and longitude of the feature's centroid.Latitude and longitude of the feature's centroid. |
| geo_shapeShape | geo_shape | Geographic shape outlining the noise exposure zone.Geographic shape outlining the noise exposure zone. |
| dbNiveau sonore en dB(A) | text | Nighttime railway noise level range in dB(A).Nighttime railway noise level range in dB(A). |
Schema captured from opendatasoft 2 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.
Sample data (5 records)
Record 1db: [65;70[ · geo_shape: [large value omitted]
{
"db": "[65;70[",
"geo_shape": "[large value omitted]",
"geo_point_2d": {
"lat": 43.648433368058065,
"lon": 1.4202819365520323
}
}Record 2db: <55 · geo_shape: [large value omitted]
{
"db": "<55",
"geo_shape": "[large value omitted]",
"geo_point_2d": {
"lat": 43.658579190341776,
"lon": 1.4179056870234301
}
}Record 3db: [70;75[ · geo_shape: [large value omitted]
{
"db": "[70;75[",
"geo_shape": "[large value omitted]",
"geo_point_2d": {
"lat": 43.65483822484739,
"lon": 1.4249793809850713
}
}Record 4db: [55;60[ · geo_shape: [large value omitted]
{
"db": "[55;60[",
"geo_shape": "[large value omitted]",
"geo_point_2d": {
"lat": 43.64744512195988,
"lon": 1.4230629743785428
}
}Record 5db: [60;65[ · geo_shape: [large value omitted]
{
"db": "[60;65[",
"geo_shape": "[large value omitted]",
"geo_point_2d": {
"lat": 43.65266545496211,
"lon": 1.4201748418896836
}
}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-fer-ln
License
- ✓ Redistributable
- ✓ Attribution required
Query examples
curl -s 'https://data.toulouse-metropole.fr/api/explore/v2.1/catalog/datasets/isoph-fer-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.
Rate limits
Dataset
Volume & freshness
License
No license declared upstream.
Source: opendatasoft
Machine-readable & source
Embed this badge in a README or wiki — it always shows the latest verification state and quality tier.