Hydrocoherent Terrain Models for Quebec at 10-Meter Resolution

Hydrocoherent numerical terrain models provide a regional representation of Quebec's relief based on altimetric and planimetric data. The models are a collaborative product from the Ministry of Natural Resources and Forests and Natural Resources Canada, offering a quality portrait of relief at a 1:50,000 scale. They feature a grid resolution of 0.324 arcseconds, corresponding to approximately 10 meters on the ground.

Use Cases

• Implement spatial analyses for natural risk assessment using the hydrocoherent altimetric values.
• Conduct landscape analysis by leveraging the connected drainage network and accurate ridge representation.
• Plan infrastructure implementation based on the 10-meter resolution grid and regional relief portrait.
• Grade lakes and model watercourse flow using the oriented filament data from the National Hydro Network.

Strengths

• Models are built on a grid with a resolution of 0.324 arcseconds, providing approximately 10-meter ground detail.
• Final product is a quality portrait of relief standardized at a scale of 1/50,000.
• Data results from a collaboration between provincial and national natural resources agencies (MRNF and NRCan).

Limitations

• Data coverage is limited to areas south of the 52nd parallel in Quebec.
• Specific sample data, row counts, and total file sizes are unavailable for review.
• The metadata description was translated using an automated tool, which may introduce ambiguities.

Provenance

Source

Ministry of Natural Resources and Forests (MRNF) and Natural Resources Canada (NRCan)

Collection Method

Processing of hypsometric and hydrographic data using the concept of hydrocoherence to ensure a connected drainage network.

Time Range

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Freshness

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Geography

Quebec, Canada, specifically south of the 52nd parallel.