Clay Shrink-Swell HazardAléa retrait/gonflement des argiles

Name: Clay Shrink-Swell Hazard
Creator: Bureau de recherches géologiques et minières
License: https://www.etalab.gouv.fr/wp-content/uploads/2017/04/ETALAB-Licence-Ouverte-v2.0.pdf

Aléa retrait/gonflement des argilesClay Shrink-Swell Hazard

Published by Bureau de recherches géologiques et minières

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This dataset provides polygon features mapping the hazard level of clay shrinkage and swelling across the Gironde department in France. It is published as part of the Bordeaux Métropole open data portal and maintained with input from the Bureau de recherches géologiques et minières (BRGM), the French geological survey. The dataset is also available in an additional format for download as AutoCAD DWG files, making it usable in geographic information systems and computer-aided design tools for land-use planning, construction risk assessment, and geotechnical studies related to soil movement caused by clay volume changes.Dictionnaire Public Ce jeu de données présente, sous la forme d'objets surfaciques, les risques d'aléa retrait/gonflement des argiles sur le territoire Girondin. Ce jeu de données est disponible dans un format additionnel : Téléchargement au format AutoCAD DWG

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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)

gididentcdatemdatealeageom_err

Click a field to see example values.

Field	Type	Description
geo_point_2dGeo Point	geo_point_2d	Geographic centroid coordinates of the area (latitude, longitude).Geographic centroid coordinates of the area (latitude, longitude).
geo_shapeShape	geo_shape	Geometric shape of the area as a GeoJSON polygon.Geometric shape of the area as a GeoJSON polygon.
gid	int	Primary key identifier of the record.Clé primaire
ident	text	Unique identifier code for the feature.Identifiant
cdate	datetime	Date and time the record was created.Date de création
mdate	datetime	Date and time the record was last modified.Date de modification
alea	text	Clay shrink-swell hazard level: Low, Medium, or High.Aléa : Liste des valeurs possibles : FAIBLE : Faible MOYEN : Moyen FORT : Fort
geom_errGeom err	text	Code indicating a geometric error type, if any.Code d'erreur géométrique : Liste des valeurs possibles : 9999 : Polygone compose et / ou à sections multiples 9998 : Linéaire compose et / ou à sections multiples 9996 : La géométrie contient des informations LRS 9995 : Nombre de dimensions différent de 2 ou 3 9994 : Présence d'un arc de cercle 9000 : Erreur autre 13343 : Polygone de moins de 4 points 13349 : Polygone papillon 13350 : Deux éléments d'un polygone archipel se touchent 13351 : Deux éléments d'un polygone archipel se touchent 13356 : Point double 13366 : Combinaison invalide d'intérieur / extérieur d'un polygone 13367 : Orientation invalide d'intérieur / extérieur d'un polygone

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.

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Sample data (5 records)

Record 1gid: 23 · alea: MOYEN

{
  "gid": 23,
  "alea": "MOYEN",
  "cdate": "2026-08-14T08:15:42+00:00",
  "ident": "RGA_041243_33249",
  "mdate": "2026-08-14T08:15:42+00:00",
  "geom_err": null,
  "geo_shape": {
    "type": "Feature",
    "geometry": {
      "type": "MultiPolygon",
      "coordinates": [
        [
          [
            [
              -0.51237,
              44.8662969
            ],
            [
              -0.5123905,
              44.8660204
            ],
            [
              -0.5120484,
              44.866107
            ],
            [
              -0.5118705,
              44.8661519
            ],
            [
              -0.5116919,
              44.8661972
            ],
            [
              -0.5116755,
              44.8662014
            ],
            [
              -0.5116591,
              44.8662055
            ],
            [
              -0.5116415,
              44.8662097
            ],
            [
              -0.5115832,
              44.866224
            ],
            [
              -0.5115135,
              44.8662416
            ],
            [
              -0.5113404,
              44.8662852
            ],
            [
              -0.5112794,
              44.8663006
            ],
            [
              -0.511153,
              44.8663326
            ],
            [
              -0.5109577,
              44.8663819
            ],
            [
              -0.5109564,
              44.8663822
            ],
            [
              -0.511175,
              44.8665419
            ],
            [
              -0.51144,
              44.8668309
            ],
            [
              -0.5115439,
              44.8670819
            ],
            [
              -0.511898,
              44.8667029
            ],
            [
              -0.51237,
              44.8662969
            ]
          ]
        ]
      ]
    },
    "properties": {}
  },
  "geo_point_2d": {
    "lat": 44.86646787468649,
    "lon": -0.5117243113302267
  }
}

Record 2gid: 7 · alea: MOYEN

{
  "gid": 7,
  "alea": "MOYEN",
  "cdate": "2026-08-14T08:15:42+00:00",
  "ident": "RGA_024603_33192",
  "mdate": "2026-08-14T08:15:42+00:00",
  "geom_err": null,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 44.7836322585961,
    "lon": -0.6136621937681718
  }
}

Record 3gid: 42 · alea: FORT

{
  "gid": 42,
  "alea": "FORT",
  "cdate": "2026-08-14T08:15:42+00:00",
  "ident": "RGA_079687_33550",
  "mdate": "2026-08-14T08:15:42+00:00",
  "geom_err": null,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 44.78352609832691,
    "lon": -0.5892727972265523
  }
}

Record 4gid: 25 · alea: FORT

{
  "gid": 25,
  "alea": "FORT",
  "cdate": "2026-08-14T08:15:42+00:00",
  "ident": "RGA_046673_33449",
  "mdate": "2026-08-14T08:15:42+00:00",
  "geom_err": null,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 44.85395104961723,
    "lon": -0.7295961346914505
  }
}

Record 5gid: 60 · alea: FORT

{
  "gid": 60,
  "alea": "FORT",
  "cdate": "2026-08-14T08:15:42+00:00",
  "ident": "RGA_111265_33522",
  "mdate": "2026-08-14T08:15:42+00:00",
  "geom_err": null,
  "geo_shape": "[large value omitted]",
  "geo_point_2d": {
    "lat": 44.817685666570505,
    "lon": -0.5877082540916735
  }
}

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

Verification Status

Using the API

Configuration

Base URL: https://opendata.bordeaux-metropole.fr/api/explore/v2.1/catalog/datasets/ri_alearga_s

License

Licence Ouverte 2.0 (France / Etalab)Open

✓ Redistributable
✓ Attribution required

Query examples

curl -s 'https://opendata.bordeaux-metropole.fr/api/explore/v2.1/catalog/datasets/ri_alearga_s/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

50 000 req/day

per ipmeasured

observed 2 days ago

Dataset

Volume & freshness

Records

127

Last upstream update

2 days ago

2026-10-22

License

No license declared upstream.

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Source: opendatasoft

Machine-readable & source

JSON

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