# Collections

## Get list of all OS NGD feature collections

> Get a list of all the available OS NGD feature collections

```json
{"openapi":"3.0.1","info":{"title":"OS NGD API – Features","version":"v1.8.0"},"tags":[{"name":"Collections","description":"Retrieve information about collections"}],"servers":[{"url":"https://api.os.uk/features/ngd/ofa/v1"}],"paths":{"/collections":{"get":{"tags":["Collections"],"summary":"Get list of all OS NGD feature collections","description":"Get a list of all the available OS NGD feature collections","operationId":"getAllCollections","responses":{"200":{"description":"All Ordnance Survey National Geographic Database feature collections.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/CollectionsResponse"}}}},"400":{"description":"The request was not supported."},"405":{"description":"The HTTP method requested is not supported. This endpoint only supports 'GET' requests."},"406":{"description":"A request header value was not supported."}}}}},"components":{"schemas":{"CollectionsResponse":{"type":"object","properties":{"links":{"type":"array","items":{"$ref":"#/components/schemas/Link"}},"crs":{"type":"array","items":{"type":"string","enum":["http://www.opengis.net/def/crs/OGC/1.3/CRS84","http://www.opengis.net/def/crs/EPSG/0/27700","http://www.opengis.net/def/crs/EPSG/0/7405","http://www.opengis.net/def/crs/EPSG/0/4326","http://www.opengis.net/def/crs/EPSG/0/3857"]}},"collections":{"type":"array","items":{"$ref":"#/components/schemas/CollectionResponse"}}}},"Link":{"type":"object","properties":{"href":{"type":"string","format":"url"},"rel":{"type":"string"},"type":{"type":"string"},"title":{"type":"string"}}},"CollectionResponse":{"type":"object","properties":{"id":{"type":"string"},"title":{"type":"string"},"description":{"type":"string"},"crs":{"type":"array","items":{"type":"string","enum":["http://www.opengis.net/def/crs/OGC/1.3/CRS84","http://www.opengis.net/def/crs/EPSG/0/27700","http://www.opengis.net/def/crs/EPSG/0/7405","http://www.opengis.net/def/crs/EPSG/0/4326","http://www.opengis.net/def/crs/EPSG/0/3857"]}},"storageCrs":{"type":"string","enum":["http://www.opengis.net/def/crs/OGC/1.3/CRS84","http://www.opengis.net/def/crs/EPSG/0/27700","http://www.opengis.net/def/crs/EPSG/0/7405","http://www.opengis.net/def/crs/EPSG/0/4326","http://www.opengis.net/def/crs/EPSG/0/3857"]},"itemType":{"type":"string"},"extent":{"$ref":"#/components/schemas/Extent"},"links":{"type":"array","items":{"$ref":"#/components/schemas/Link"}}}},"Extent":{"type":"object","properties":{"spatial":{"$ref":"#/components/schemas/SpatialExtent"},"temporal":{"$ref":"#/components/schemas/TemporalExtent"}}},"SpatialExtent":{"type":"object","properties":{"bbox":{"type":"array","items":{"type":"array","items":{"type":"number","format":"double"}}},"crs":{"type":"string"}}},"TemporalExtent":{"type":"object","properties":{"interval":{"type":"array","items":{"type":"array","items":{"type":"string"}}},"trs":{"type":"string"}}}}}}
```