Weather Observed

Description

An observation of weather conditions at a certain place and time. This data model has been developed in cooperation with mobile operators and the GSMA.

Data Model

A JSON Schema corresponding to this data model can be found here.

id : Unique identifier.
type : Entity type. It must be equal to WeatherObserved.
dataProvider : Specifies the URL to information about the provider of this information
- Attribute type: Property. URL
- Optional
dateModified : Last update timestamp of this entity.
- Attribute type: Property. DateTime
- Read-Only. Automatically generated.
dateCreated : Entity's creation timestamp.
- Attribute type: Property. DateTime
- Read-Only. Automatically generated.
name : Name given to the weather observed location.
- Normative References: https://schema.org/name
- Optional
location : Location of the weather observation represented by a GeoJSON geometry.
- Attribute type: Property. geo:json.
- Normative References: https://tools.ietf.org/html/rfc7946
- Mandatory if address is not defined.
address : Civic address of the weather observation. Sometimes it corresponds to a weather station address.
- Normative References: https://schema.org/address
- Mandatory if location is not present.
dateObserved : The date and time of this observation in ISO8601 UTCformat. It can be represented by an specific time instant or by an ISO8601 interval.
- Attribute type: Property. DateTime or an ISO8601 interval represented as Text.
- Mandatory
source : A sequence of characters giving the source of the entity data.
- Attribute type: Property. Text or URL
- Optional
refDevice : A reference to the device(s) which captured this observation.
- Attribute type: Relationship. Reference to an entity of type Device
- Optional
refPointOfInterest : A reference to a point of interest (usually a weather station) associated to this observation.
- Attribute type: Relationship. Reference to an entity of type PointOfInterest
- Optional
weatherType : The observed weather type. It is represented by a comma separated list of weather statuses, for instance overcast, lightRain.
- Attribute type: Property. Text
- Allowed values: A combination of (clearNight,sunnyDay, slightlyCloudy, partlyCloudy, mist, fog, highClouds, cloudy, veryCloudy, overcast, lightRainShower, drizzle, lightRain, heavyRainShower, heavyRain, sleetShower, sleet, hailShower, hail, shower, lightSnow, snow, heavySnowShower, heavySnow, thunderShower, thunder) or any other extended value.
- Optional
dewPoint : The dew point encoded as a number.
- Attribute type: Property. Number
- Default unit: Celsius degrees.
- See also: https://en.wikipedia.org/wiki/Dew_point
- Optional
visibility : Visibility reported.
- Attribute type: Property. Text
- Allowed values: One of (veryPoor, poor, moderate, good, veryGood, excellent)
- Optional
temperature : Air's temperature observed.
- Attribute type: Property. Number
- Default unit: Degrees centigrades.
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
relativeHumidity : Air's relative humidity observed (percentage, expressed in parts per one).
- Attribute type: Property. Number
- Allowed values: A number between 0 and 1.
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
precipitation : Precipitation level observed.
- Attribute type: Property. Number
- Default unit: Liters per square meter.
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
windDirection : The wind direction expressed in decimal degrees compared to geographic North (measured clockwise), encoded as a Number.
- Attribute type: Property. Number
- Default unit: Decimal degrees
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
windSpeed : The observed wind speed in m/s, encoded as a Number.
- Attribute type: Property. Number
- Default unit: meters per second
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
atmosphericPressure : The atmospheric pressure observed measured in Hecto Pascals.
- Attribute type: Property. Number
- Default unit: Hecto Pascals
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
pressureTendency : Is the pressure rising or falling? It can be expressed in quantitative terms or qualitative terms.
- Attribute type: Property. Text or Number
- Allowed values, if expressed in quantitative terms: one Of (raising, falling, steady)
- Optional
solarRadiation : The solar radiation observed measured in Watts per square meter.
- Attribute type: Property. Number
- Default unit: Watts per square meter
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
    - Type: DateTime
- Optional
illuminance : The illumninance observed measured in lux (lx) or lumens per square metre (cd·sr·m−2).
- Attribute type: Property. Number
- Default unit: Lux
- Attribute metadata:
- timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
  - Type: DateTime
- Optional
streamGauge: The water level surface elevation observed by Hydrometric measurement sensors, namely a Stream Gauge, expressed in centimeters.
- Attribute type: Property. Number
- Default unit: Centimeters (cm)
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
- Optional
snowHeight: The snow height observed by generic snow depth measurement sensors, expressed in centimeters.
- Attribute type: Property. Number
- Default unit: Centimeters (cm)
- Attribute metadata:
  - timestamp : optional timestamp for the observed value. It can be omitted if the observation time is the same as the one captured by the dateObserved attribute at entity level.
- Optional

Note: JSON Schemas are intended to capture the data type and associated constraints of the different Attributes, regardless their final representation format in NGSI(v2, LD).

Examples

Normalized Example

Normalized NGSI response

{
    "id": "Spain-WeatherObserved-Valladolid-2016-11-30T07:00:00.00Z",
    "type": "WeatherObserved",
    "dateObserved": {
        "type": "DateTime",
        "value": "2016-11-30T07:00:00.00Z"
    },
    "illuminance": {
        "value": 1000
    },
    "temperature": {
        "value": 3.3
    },
    "precipitation": {
        "value": 0
    },
    "atmosphericPressure": {
        "value": 938.9
    },
    "pressureTendency": {
        "value": 0.5
    },
    "refDevice": {
        "type": "Relationship",
        "value": "device-0A3478"
    },
    "source": {
        "value": "http://www.aemet.es"
    },
    "windSpeed": {
        "value": 2
    },
    "location": {
        "type": "geo:json",
        "value": {
            "type": "Point",
            "coordinates": [-4.754444444, 41.640833333]
        }
    },
    "stationName": {
        "value": "Valladolid"
    },
    "address": {
        "type": "PostalAddress",
        "value": {
            "addressLocality": "Valladolid",
            "addressCountry": "ES"
        }
    },
    "stationCode": {
        "value": "2422"
    },
    "dataProvider": {
        "value": "TEF"
    },
    "windDirection": {
        "value": -45
    },
    "relativeHumidity": {
        "value": 1
    },
    "streamGauge": {
        "value": 50
    },
    "snowHeight": {
        "value": 20
    }
}

key-value pairs Example

Sample uses simplified representation for data consumers ?options=keyValues

{
    "id": "Spain-WeatherObserved-2422-2016-11-30T08:00:00",
    "type": "WeatherObserved",
    "address": {
        "addressLocality": "Valladolid",
        "addressCountry": "ES"
    },
    "atmosphericPressure": 938.9,
    "dataProvider": "TEF",
    "dateObserved": "2016-11-30T07:00:00.00Z",
    "location": {
        "type": "Point",
        "coordinates": [-4.754444444, 41.640833333]
    },
    "precipitation": 0,
    "pressureTendency": 0.5,
    "relativeHumidity": 1,
    "source": "http://www.aemet.es",
    "stationCode": "2422",
    "stationName": "Valladolid",
    "temperature": 3.3,
    "windDirection": -45,
    "windSpeed": 2,
    "illuminance": 1000
}

LD Example

Sample uses the NGSI-LD representation

{
    "id": "urn:ngsi-ld:WeatherObserved:Spain-WeatherObserved-Valladolid-2016-11-30T07:00:00.00Z",
    "type": "WeatherObserved",
    "dateObserved": {
        "type": "Property",
        "value": {
            "@type": "DateTime",
            "@value": "2016-11-30T07:00:00.00Z"
        }
    },
    "illuminance": {
        "type": "Property",
        "value": 1000
    },
    "temperature": {
        "type": "Property",
        "value": 3.3
    },
    "precipitation": {
        "type": "Property",
        "value": 0
    },
    "atmosphericPressure": {
        "type": "Property",
        "value": 938.9
    },
    "pressureTendency": {
        "type": "Property",
        "value": 0.5
    },
    "refDevice": {
        "type": "Relationship",
        "object": "urn:ngsi-ld:Device:device-0A3478"
    },
    "source": {
        "type": "Property",
        "value": "http://www.aemet.es"
    },
    "windSpeed": {
        "type": "Property",
        "value": 2
    },
    "location": {
        "type": "GeoProperty",
        "value": {
            "type": "Point",
            "coordinates": [-4.754444444, 41.640833333]
        }
    },
    "stationName": {
        "type": "Property",
        "value": "Valladolid"
    },
    "address": {
        "type": "Property",
        "value": {
            "addressLocality": "Valladolid",
            "addressCountry": "ES",
            "type": "PostalAddress"
        }
    },
    "stationCode": {
        "type": "Property",
        "value": "2422"
    },
    "dataProvider": {
        "type": "Property",
        "value": "TEF"
    },
    "windDirection": {
        "type": "Property",
        "value": -45
    },
    "relativeHumidity": {
        "type": "Property",
        "value": 1
    },
    "streamGauge": {
        "type": "Property",
        "value": 50
    },
    "snowHeight": {
        "type": "Property",
        "value": 20
    },
    "@context": [
        "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context.jsonld",
        "https://schema.lab.fiware.org/ld/context"
    ]
}

Public instance

You can read about public instance offering information about observed weather here.