# helsinki

`https://hel.fi/models/helsinki/helsinki/views/p2qfrq3sxuoif6okjzhrp4jwul3eeowd`

## AirQualityObserved

One air quality station around Helsinki and its newest hourly readings: FMI's stations, and the stations a steward adds by hand, which carry no source.

| Slot | Range | Kind | Required | Multivalued | Description |
|---|---|---|---|---|---|
| location | string | GeoProperty | no | no | Where the entity is, as GeoJSON geometry. |
| name | string | LanguageProperty | no | no | The name, per language. |
| dateObserved | datetime | Property | no | no | When the readings were taken. |
| pm10 | float | Property | no | no | Particulate matter up to 10 µm, the hour's mean at the station. |
| pm25 | float | Property | no | no | Particulate matter up to 2.5 µm, the hour's mean at the station. |
| source | uri | Property | no | no | The open-data service the entity was read from. |