PPR Subsidence Hazard Map for Châlons-en-Champagne Sector

A 2019 dataset from the French Geological Survey (BRGM) mapping subsidence and collapse hazards from underground cavities in the Châlons-en-Champagne sector. The regulatory zoning is defined at a 1/10,000 scale based on studies conducted at 1/17,000 scale. It includes a 10-meter uncertainty band to account for mapping accuracy limitations.

Use Cases

• Incorporating hazard zones into urban planning documents based on the described regulatory zoning.
• Assessing property-level risk from underground cavities based on the mapped hazard areas and susceptibility zones.
• Defining area-specific regulations for planning permissions based on the guide for interpreting the uncertainty band.

Strengths

• Mapping was conducted at a detailed 1/17,000 scale.
• Includes a defined 10-meter uncertainty band to manage precision expectations.
• Provides a specific guide for municipalities to transpose the map into planning documents.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Last updated 2019-07-30 00:00:00; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

BUREAU DE RECHERCHES GÉOLOGIQUES ET MINIÈRES (BRGM)

Collection Method

Studies carried out for the development of the PPR Subsidence hazard map.

Freshness

Last updated 2019-07-30 00:00:00

Geography

Châlons-en-Champagne sector, France