Observation Instance – Django REST framework

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/9199/?format=api

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 9199,
    "uuid": "b8df3216e1d8cc0b0a3641bff0caa7ac",
    "title": "Data from the Photographic Camera, CASI, CASI-2 and ATM AZ-16 Instruments on-board the Piper PA31 Navajo Chieftain G-NERC Aircraft and the Dornier Do228-101 D-CALM Aircraft during Flight 98/08 over the Bosworth Field Area",
    "abstract": "Flights during 1998 used the photographic camera, CASI-1 and ATM AZ-16 instruments on-board the Piper PA31 Navajo Chieftain G-NERC aircraft.  Flights during 2002 were with the photographic camera, ATM AZ-16 and CASI-2 instruments on the Dornier Do228-101 D-CALM aircraft.",
    "keywords": "ARSF, 98/08, Bosworth Field",
    "publicationState": "published",
    "dataPublishedTime": "2012-07-10T16:33:42",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/9200/?format=api",
        "dataPath": "/neodc/arsf/2002/98_08",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 2742013297,
        "numberOfFiles": 78,
        "fileFormat": null
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/2599/?format=api",
    "geographicExtent": null,
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/64846/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/64847/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/65006/?format=api"
    ],
    "dataLineage": "Data have been provided to NEODC via a number of routes: \r\nMost data up to 2005 was provided directly from ARSF flight team (ARSF-Ops) or Andrew Wilson at CEH, on various media.\r\nData since 2008 was mostly transferred to NEODC from ARSF-Data Analysis Node (DAN) in Plymouth via rsync.\r\nData for 2006 - 2008 were provided partly from ARSF-DAN, partly from ARSF-Ops, and some from Andrew Wilson.  \r\nData from the ULM LiDAR instrument was provided, via FTP or on media, from ULM Cambridge.\r\nScanned aerial photographs were provided by Bluesky Ltd, who carried out the digitisation, on LaCiE disks. \r\nSome data (\"user_provided\") was sent to NEODC by ARSF data users.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/5966/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/9201/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/8604/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30129/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35310/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35315/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35309/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35314/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35312/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35313/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35316/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/35311/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/9202/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2522/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}