A noise map layer from 2022 shows areas where the Lden noise indicator is 75 dB(A) or higher for roads with annual traffic exceeding 3 million vehicles in Finistère, France. This dataset is part of a 12-layer set produced by the Bureau de Recherches Géologiques et Minières (BRGM) for the third deadline of noise mapping under the Environmental Code. The maps use harmonized European indicators to inform the public and provide authorities with diagnostics for noise pollution management.
Use Cases
- Identify residential areas exposed to high noise levels based on the Lden indicator exceeding 75 dB(A).
- Assess compliance with noise limit values for educational and health buildings based on the described exceedance layers.
- Support noise mitigation planning for authorities using the objective diagnostic elements mentioned in the description.
- Compare noise exposure across different thresholds (55-75 dB(A) in 5 dB(A) steps) using the related layers.
Strengths
- Part of a structured 12-layer noise mapping set covering multiple thresholds and time periods.
- Based on harmonized European noise indicators (Lden, Ln) as defined by Directive 2002/49/EC.
- Created for a specific regulatory deadline (third deadline) under the French Environmental Code.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Last updated 2022-01-25; freshness should be verified.
Provenance
- Source
- Bureau de Recherches Géologiques et Minières (BRGM)
- Collection Method
- Noise mapping pursuant to Articles R 572-1 et seq. of the French Environmental Code.
- Freshness
- 2022-01-25
- Geography
- Finistère, France