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/37244/?format=api

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

{
    "ob_id": 37244,
    "uuid": "8a798466b9f74b3da500004a94ee5fee",
    "title": "Intra-annual multi-temporal reflectance of 17 herbaceous species of chalk grassland using leaf-clip mounted on spectrometer",
    "abstract": "A time-series of leaf-level optical hyperspectral reflectance captured using a leaf-clip and handheld spectrometer for 17 herbaceous species typical of chalk grassland habitat in Kent UK, over 13 sampling dates in 2021.  Data were collected using a non-imaging spectrometer manufactured by Spectra-vista Corporation fitted with a leaf-clip; capturing reflectance from 350 - 2500nm.  Funded by NERC Grant NE/L002566/1.",
    "keywords": "hyperspectral, chalk, grassland",
    "publicationState": "citable",
    "dataPublishedTime": "2022-05-03T14:43:37",
    "doiPublishedTime": "2022-05-04T09:01:14.731563",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/37245/?format=api",
        "dataPath": "/badc/deposited2022/WW_leaf_clip_species/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 22189306,
        "numberOfFiles": 2,
        "fileFormat": "Data are BADC-CSV formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/10289/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/3452/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3969/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48829/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48830/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48831/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48832/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48833/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48834/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/48835/?format=api"
    ],
    "dataLineage": "Data was created by Rachael Thornley; no additional stages",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/12116/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/37246/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177983/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177984/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177985/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177986/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177987/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177988/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177993/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177994/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177995/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177996/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/177997/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/37247/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2521/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/missing_licence.pdf",
            "licenceClassifications": "unstated"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}