Canadian Drainage Areas At 1:1,000,000 Scale

A 1:1,000,000 scale dataset of drainage area boundaries for Canada, based on Water Survey of Canada sub-sub-basin definitions. The data supports derivation of WSC and Atlas of Canada drainage area hierarchies and is integrated with other national hydrology frameworks. It was compiled by the Government of Yukon for correct relative positioning with other base map layers.

Use Cases

• Derive Water Survey of Canada drainage area hierarchies from the sub-sub-basin level boundaries.
• Analyze integrated hydrology themes by combining this dataset with other National Scale Frameworks layers.
• Perform spatial analysis on sub-sub-basin level drainage areas for water resource modeling.
• Use the 1:1,000,000 scale boundaries for cartographic base mapping and relative positioning studies.

Strengths

• Compiled at a standardized 1:1,000,000 scale for national framework integration.
• Based on authoritative Water Survey of Canada drainage area boundaries.
• Integrated with other National Scale Frameworks hydrology datasets for thematic analysis.
• Boundaries reviewed and manually adjusted using larger-scale reference data sources.

Limitations

• Primary goal is correct relative positioning, not absolute positional accuracy.
• Sample data and specific row/column counts are unavailable for assessing granularity.
• File formats are limited to ESRI REST and HTML, which may require specific GIS software.

Provenance

Source

Government of Yukon, distributed via GeoYukon.

Collection Method

Based on Water Survey of Canada drainage area boundaries, reviewed and manually adjusted with larger-scale references.

Time Range

null

Freshness

Last updated March 25, -2026.

Geography

Canada, with data from Yukon.