Quebec Lidar Terrain and Canopy Models at 1:20,000 Scale

Lidar-derived geospatial products from Quebec's Ministry of Natural Resources and Forests cover southern Quebec. The data includes five models: digital terrain, shaded relief terrain, canopy height, slopes, and level curves, distributed in 1:20,000 scale map sheets.

Use Cases

• Generate high-resolution digital terrain models for hydrological or erosion modeling.
• Analyze canopy height model data to assess forest structure and biomass.
• Calculate slope gradients from slope rasters for terrain stability or land-use planning.
• Create visual terrain representations using level curves for cartographic purposes.

Strengths

• Includes five distinct derived products: digital terrain, shaded relief, canopy height, slopes, and level curves.
• Covers almost all of southern Quebec, providing broad regional coverage.
• Original data has high spatial resolution, with digital terrain and canopy models at 1 meter.

Limitations

• Planimetric and altimetric accuracy of level curves is variable and lower than the source lidar, limiting quantitative use.
• Resolution of some products is degraded in the interactive map viewer, reducing detail for online inspection.

Provenance

Source

Ministry of Natural Resources and Forests (MRNF) of Quebec.

Collection Method

Derived from provincial lidar sensor data acquisition project.

Time Range

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Freshness

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Geography

Almost all of southern Quebec.