Flood Extent Mapping Beyond Established Zones in Quebec

2022 data from Lac-Saint-Jean and Saint-Maurice River sectors delineates flooded areas exceeding established cartographic flood zones. Photogrammetric capture from aerial photographs was used to map the farthest water limits reached during flooding events. The dataset supports the Plan for the protection of the territory against floods (PPTFI).

Use Cases

• Delineate flood extent boundaries from photogrammetric capture for areas beyond mapped zones.
• Analyze flood event maps for Lac-Saint-Jean and Saint-Maurice River sectors from 2022.
• Support hydrological modeling by comparing actual 2022 flood extents against established cartographic zones.

Strengths

• Data derived from aerial photographs using photogrammetric capture for spatial accuracy.
• Explicitly maps two sectors (Lac-Saint-Jean and Saint-Maurice River) with 2022 temporal coverage.
• Produced under a formal government plan (PPTFI), indicating an authoritative use case.

Limitations

• Limited geographic coverage to only two mapped sectors in Quebec.
• Temporal coverage is restricted to a single year (2022), lacking a longitudinal series.
• Data structure (rows, columns, sample) is unspecified, complicating automated analysis.

Provenance

Source

Government and Municipalities of Québec

Collection Method

Photogrammetric capture from aerial photographs taken during floods.

Time Range

2022

Freshness

null

Geography

Lac-Saint-Jean and Saint-Maurice River sectors, Quebec, Canada.