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/7991/?format=api

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

{
    "ob_id": 7991,
    "uuid": "ec54aec922960e88c3d044b3d1c49e77",
    "title": "NCAVEO: GER1500 spectroradiometer asphalt reflectance spectra collected from the asphalt car park at the Chilbolton Facility for Atmospheric and Radio Research (CFARR)",
    "abstract": "An area of asphalt, approximately 3m by 3m in size, within the CFARR perimeter was used as a persistent validation target and frequent reflectance measurements made as part of the (Network for Calibration and Validation of EO data (NCAVEO) 2006 Field Campaign. The centre British National Grid co-ordinates of this validation target, which can be distinguished in the CASI images, are (BNG Easting, BNG Northing) 439335.00, 138586.00. A trolley-mounted GER1500 dual field-of-view spectroradiometer was used to measure the HCRF of the asphalt validation target between 10:54 and 11:38 GMT on the 17th June. \r\n",
    "keywords": "NCAVEO, SPECTRORADIOMETER, ASPHALT, REFLECTANCE, CHILBOLTON",
    "publicationState": "published",
    "dataPublishedTime": "2008-10-08T13:42:21",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/12672/?format=api",
        "dataPath": "/neodc/ncaveo_field/data/Field_spectra/Asphalt_Spectra",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 389078,
        "numberOfFiles": 6,
        "fileFormat": "Spectra data is in SPC and HDR format, and can be viewed in ENVI. A photograph is also available in JPG format showing the dual field-of-view GER1500 being prepared for data collection. "
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/2284/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/172/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "These data were provided to NEODC by university of Southampton, who carried out work to convert formats to NASA-Ames, and write metadata documents. The metadata documents describing the processing are archived alongside the data as PDF files.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/5198/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/7827/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/7824/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30128/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32706/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32711/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32705/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32708/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32709/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32710/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32712/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/32707/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/7994/?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"
        }
    ]
}