Topographic Wetness Index Derived From Québec LiDAR

Provincial LiDAR sensor data acquisition project in Québec produced a Topographic Wetness Index (TWI) from a digital terrain model. The matrix layers indicate water accumulation potential based on slope and upslope contributing area per pixel.

Use Cases

• Model hydrological flow and water accumulation potential using the Topographic Wetness Index (TWI) values.
• Analyze terrain characteristics by integrating TWI data with slope and contributing area calculations.
• Support environmental planning and flood risk assessment with pixel-level water accumulation indicators.

Strengths

• Derived from aerial LiDAR (Light Detection and Ranging) data, a precise remote sensing method.
• Provides a specific environmental index (Topographic Wetness Index) for hydrological modeling.
• Data is provided in multiple formats including SHP, CSV, and PDF for varied use.

Limitations

• Specific data volume, row count, and column details are unknown.
• The original description was machine-translated, which may introduce ambiguity.
• Sample data is unavailable for preliminary inspection of data structure.

Provenance

Source

Government and Municipalities of Québec.

Collection Method

Produced from a digital terrain model derived from aerial LiDAR.

Time Range

null

Freshness

Last updated 2026 -03-25.

Geography

Province of Québec, Canada.