# The noise under London

> Modelled road and rail noise, by day and by night, on the same 500-metre grid.

- Category: Environment
- Cadence: irregular
- Status: Published on a irregular cadence.
- Dataset key: `strategic-noise`
- Source: [Department for Environment, Food & Rural Affairs](https://www.gov.uk/government/publications/strategic-noise-mapping-2022)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/the-noise-under-london](https://londongraph.com/g/the-noise-under-london)
- Machine-readable record: [https://londongraph.com/data/the-noise-under-london](https://londongraph.com/data/the-noise-under-london)

## Methodology

The nearest Defra 2022 10-metre model cell to each 500-metre cell centre. Values are modelled four metres above ground; cells below Defra's publication thresholds remain unavailable rather than becoming zero.

## Visualisations

- [Map](https://londongraph.com/g/the-noise-under-london): Modelled road and rail noise, by day and by night, on the same 500-metre grid.
- [Distribution](https://londongraph.com/g/the-noise-under-london?view=distribution): Place every mapped area in the selected measure's distribution while preserving missing values.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.