Get a list of Observation objects.

### Available end points:

- `/observations/` - Will list all Results in the database
- `/observations.json` - Will return all Results in json format. This can
also be achieved by using the accept header. `application/json`
- `/observations/<object_id>/` - Returns Results object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `status`
- `result_field`
- `discoveryKeywords`
- `updateFrequency`
- `nonGeographicFlag`
- `publicationState`
- `permissions`

### How to use filters:

These filters can be used like django query filters using __ for related model relationships.

- `/observations/?uuid=d594d53df2612bbd89c2e0e770b5c1a0`
- `/observations/?status=completed`
- `/observations/?results_field__dataPath__startswith=/neodc/esacci`
- `/observations/?discoveryKeywords__name=ESACCI`
- `/observations/?nonGeographicFlag=True`

Filters can be stacked to build an 'AND' relationship. E.g.

- `/observations/?publicationState__in=published,citable&nonGeographicFlag=True`
- `/observations/?publicationState__in=published,citable&discoveryKeyword__name=NDGO0003`

GET /api/v2/observations/12424/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 12424,
    "uuid": "620f6ed379d543098be1126769111007",
    "title": "UKCP09: Met Office gridded land surface climate observations - long term averages at 5km resolution",
    "abstract": "This dataset contains a set of reference long term averages for observed climate variables on a 5km resolution grid. Where possible, reference climatologies are available for the periods 1961-1990, 1971-2000 and 1981-2010 for each variable. The availability of the variable for the given reference period was dependant on sufficient data being available for the variable for that period. \r\n\r\nThe data were derived from the Met Office gridded land surface climate observations - monthly variables at 5km resolution (see related dataset). The averages are calculated by averaging the 30 monthly or annual gridded datasets for each variable for each averaging period.\r\n\r\nThe data are provide in CF-1.5 compliant NetCDF format. The data are additionally provided in ESRI-ascii format, suitable for ingestion in GIS applications.",
    "keywords": "UKCP09, Met Office, DEFRA, land surface, climate observations",
    "publicationState": "published",
    "dataPublishedTime": "2017-08-21T11:36:47",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/12423/?format=api",
        "dataPath": "/badc/ukcp09/data/gridded-land-obs/gridded-land-obs-averages-5km",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 361287165,
        "numberOfFiles": 639,
        "fileFormat": "The data are provide in CF-1.5 compliant NetCDF format. The data are additionally provided in ESRI-ascii format, suitable for ingestion in GIS applications."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/6746/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/674/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/1633/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3301/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3302/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/6023/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11482/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11483/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11484/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11485/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11486/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11487/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11488/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11489/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11490/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11491/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11492/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11493/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11494/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11495/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11496/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11497/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11498/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11499/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11500/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11501/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11502/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11503/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11504/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11505/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11506/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11507/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11508/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11509/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11510/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11511/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11512/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11513/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11514/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11515/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11516/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11517/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21978/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25154/?format=api"
    ],
    "dataLineage": "Data were produced by the Met Office for the UKCP09 service and then prepared for archiving with Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/12420/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/12422/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47801/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47417/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47804/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47803/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47802/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47800/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47799/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/102092/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/47416/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/102093/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/24942/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2526/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}