Spring 2023 Québec Flood Event Mapping and Satellite Imagery

Spring 2023 flood mapping integrates open water extent polygons from radar satellites, event location points, and affected municipality boundaries. The dataset combines RADARSAT Constellation Mission imagery processed by Natural Resources Canada with Sentinel-1 and Sentinel-2 data from the European Space Agency. Records of flood events are maintained by the Deputy Directorate General of Operations of Québec's Ministry of Public Security.

Use Cases

• Analyze the correlation between open water extent polygons and recorded flood event point locations to validate satellite-derived flood detection.
• Map the progression of flooding by overlaying Sentinel-2 satellite image composites with affected municipality boundaries over time.
• Assess flood impact severity by spatially joining flood event points with municipal administrative areas.
• Train a model to classify open water from RADARSAT Constellation Mission radar imagery using the provided open water extent polygons as ground truth labels.

Strengths

• Includes multiple complementary data layers: event points, water polygons, municipal boundaries, and satellite imagery.
• Data sources are authoritative, combining satellite imagery from Natural Resources Canada and the European Space Agency with operational records from Québec's Ministry of Public Security.
• Available in multiple geospatial formats including GEOJSON, SHP, and WFS for interoperability.

Limitations

• The exact spatial and temporal resolution of the satellite imagery is unspecified, limiting precision for fine-scale analysis.
• Flood event points are described as approximate locations, which may introduce positional inaccuracies.
• The dataset appears static for the Spring 2023 period, with no stated plan for ongoing updates to capture future events.

Provenance

Source

Government and Municipalities of Québec, Ministry of Public Security, Natural Resources Canada, European Space Agency

Collection Method

Satellite imagery processing and integration of operational records from civil security events.

Time Range

Events recorded since April 14, 2023, during Spring 2023 floods.

Freshness

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Geography

Québec, Canada, specifically areas affected by the Spring 2023 floods.