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/26761/?format=api

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

{
    "ob_id": 26761,
    "uuid": "3b1502730218439bb9ae01d4d2f6f55a",
    "title": "GAUGE: Methane, Carbon Dioxide and Nitrous Oxide measurements taken from Heathfield Tower.",
    "abstract": "This dataset contains Methane, Carbon Dioxide and Nitrous Oxide measurements taken from Heathfield Tower at 50m and 100m. The measurements were taken using a Gas Chromatography-micro Electron Capture Detector (GC-ECD).   This data was collected as part of the NERC GAUGE (Greenhouse gAs UK and Global Emissions) project (NE/K002449/1NERC and TRN1028/06/2015). \r\n\r\nThe GAUGE project aimed to produce robust estimates of the UK Greenhouse Gas budget, using new and existing measurement networks and modelling activities at a range of scales. It aimed to integrate inter- calibrated information from ground-based, airborne, ferry-borne, balloon-borne, and space-borne sensors, including new sensor technology.",
    "keywords": "GAUGE, N2O,  CH4, CO2, Tower",
    "publicationState": "published",
    "dataPublishedTime": "2018-11-27T08:52:38",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/26766/?format=api",
        "dataPath": "/badc/gauge/data/tower/heathfield",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 118553123,
        "numberOfFiles": 6,
        "fileFormat": "Data are NetCDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/7211/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2299/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/12182/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/23443/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58411/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58412/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58413/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58414/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58415/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58416/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58417/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/83106/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/83107/?format=api"
    ],
    "dataLineage": "Data were collected by the University of Bristol and deposited at the Centre for Environmental Data Analysis (CEDA) for archiving.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10524/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10525/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10526/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10527/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/12409/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/12404/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112609/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112610/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112611/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112612/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112614/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112615/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112616/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112617/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112613/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/168404/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112618/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/112619/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/26762/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2528/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "http://creativecommons.org/licenses/by/4.0/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}