Canadian National Drainage Network at 1:1 Million Scale

Atlas of Canada National Frameworks data provides a standardized linear representation of Canada's surface water hydrology. The dataset includes single-line rivers, flow lines through waterbodies, and ocean coastlines, enabling network analysis and cartographic generalization. It is compiled at a 1:1,000,000 scale to ensure correct relative positioning with other national framework layers.

Use Cases

• Perform hydrologic network analysis using river flow direction and connectivity attributes.
• Model hydrological flow through lakes and rivers using the virtual linear flow lines within waterbodies.
• Delineate oceanic islands for cartographic purposes using the coastline component of the drainage skeleton.
• Link geographical name keys from the Concise Gazetteer of Canada to selected rivers, lakes, and islands for feature identification.

Strengths

• Data compiled at a standardized national scale of 1:1,000,000 for consistent relative positioning.
• Includes key value-added characteristics like river flow direction and connectivity.
• Derived from the original Vector Map level 0 (VMAP0) revision 4 hydrographic layers, with revision editing.

Limitations

• Positional accuracy is prioritized for relative positioning with other layers, not absolute geographic precision.
• Data completeness is limited to the content of the original VMAP0 source layers.
• The linear representation simplifies complex waterbody geometries into flow lines.

Provenance

Source

Government of Yukon, distributed via GeoYukon.

Collection Method

Compiled from Vector Map level 0 (VMAP0) revision 4 hydrographic layers, with revision editing.

Time Range

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Freshness

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Geography

National coverage of Canada's surface water features.