Coverage

• High confidence

  An official strategic noise map band covers the point. The official band is the primary indicator and the result shows it in decibels (Lden and night Ln).

• Estimated

  No official band covers the point, but enough open geographic data is available for an estimated risk assessment. No decibel value is shown.

• Insufficient

  The available data does not support a reliable assessment — for example, where very few streets are mapped. No score is shown.

There is no precomputed coverage map: official maps are queried live for each point. The map above shows the area; the lists on this page say which sources apply where.

Official maps from the Ministry for the Ecological Transition (MITECO / SICA, 3rd round) for major roads, railways, airports and agglomerations across the whole country, plus the European Environment Agency compilation of the latest round reported by Spain.

Valencian Community: also the Generalitat Valenciana 4th-round maps for regional roads and railways, and each municipality's acoustic planning status (Municipal Acoustic Plan and Acoustically Saturated Zones).

Catalonia: 4th-round maps of 11 agglomerations, street-by-street maps of Barcelona and the acoustic capacity (zoning) map of 593 municipalities (Generalitat de Catalunya). Navarre: 4th-round maps and zoning of the Pamplona area (IDENA). Madrid: the council's acoustic areas, so quality objectives use the real zone type.

Also in Spain: the building from the Cadastre, measured levels from municipal noise monitors (Madrid and València-Russafa), licensed terraces (Madrid and Barcelona) and acoustically saturated zones (València).

Because every official source is queried, HowNoisy can state when no mapped major source reaches a point.

Official contours compiled by the European Environment Agency are used for Austria, Belgium, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Ireland, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Romania, Spain, Sweden and Switzerland.

Italy, Portugal, the United Kingdom, Norway, Greece, Hungary, Bulgaria, Slovakia, Slovenia, Turkey and Iceland do not currently have contours in that compilation: results there rely on open geographic data until their national services are connected.

No official noise maps are connected yet. Results are estimated from OpenStreetMap (roads, railways, airports, industry and nightlife) and the result page says so explicitly.

Coverage grows as national and regional noise-map services are connected. Because sources are queried live, a newly published official round is used as soon as the publisher updates its service. If a service is down, the result says which source could not be checked instead of estimating around it.