Quebec Terrain Slope Classes Derived from Topographic Models

Slope classes categorize terrain slopes across Quebec south of the 52nd parallel into six percentage ranges. The data were originally produced in 2005, updated in 2006, and enhanced with northern slope information in 2010. It is presented in provincial and 1/250,000 scale groupings assembled from 1/20,000 scale sheets.

Use Cases

• Classify land into one of six slope categories (0-3%, 4-8%, 9-15%, 16-30%, 31-40%, 41%+) for terrain analysis.
• Map slope distribution at provincial or 1/250,000 scale groupings to assess regional topography.
• Integrate slope class data with other layers from the Quebec Topographic Database for environmental modeling.

Strengths

• Data covers almost all of Quebec south of the 52nd parallel, providing broad spatial coverage.
• Slopes are grouped into six distinct percentage-based classes for clear categorical analysis.
• Derived from a numerical terrain model based on 1/20,000 and 1/50,000 scale topographic maps.

Limitations

• Core geographic database was produced in 2010 and has never been updated, potentially missing recent landscape changes.
• Data for the northernmost part was only added in 2010, with no updates since, limiting temporal freshness.
• The description lacks concrete metrics like row count, file size, or sample data for assessing scale.

Provenance

Source

Government and Municipalities of Québec

Collection Method

Generated from a numerical terrain model using level curves and altitude points from the Quebec Topographic Database.

Time Range

Originally produced 2005-2006, with northern slope enhancements added in 2010.

Freshness

null

Geography

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