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Layer Methodology

Flood Risk

Montreal floodplain context is live for resilience screening.

LiveStudy areas

Map Role

Flood-prone areas for resilience planning and site risk screening.

What It Shows

This layer publishes Montreal's floodplain index polygons so resilience and stormwater interventions can be screened against flood-sensitive edges at planning scale.

Sources

  • Montreal Open Data Index des plaines inondables
  • Federal and CanVec fallbacks remain configured in ETL for future city expansion

Method

  1. 1.Download Montreal's published floodplain index GeoJSON.
  2. 2.Normalize study metadata and floodplain labels into a shared GeoJSON schema.
  3. 3.Publish the result as a bundled frontend asset for overlay use.

Refresh Cadence

Snapshot asset. Refresh when the Montreal source changes or the ETL is rerun.

Coverage

Montreal only in the current public deploy.

Caveats

  • It should be read as contextual planning support, not a legal or engineering flood designation.
  • Other study areas still need source-specific publication before they can be marked live.