Ontario Hydrographic Line Features Including Dams and Rapids

Geospatial line data from the Government of Ontario representing natural and manmade hydrographic features that can impede waterflow or navigation. The dataset includes features such as break walls, dams, waterfalls, lock-gates, rapids, rocks, Sea Lamprey barriers, and shipwrecks. It was last updated in March 2026 and requires GIS software for use.

Use Cases

• Analyze the distribution of manmade barriers like dams and lock-gates to assess their impact on river connectivity.
• Map the location of natural hazards such as rapids and rocks for recreational waterway safety planning.
• Identify Sea Lamprey barrier locations to support invasive species control programs in Ontario waterways.
• Use break wall and shipwreck features for coastal management and maritime heritage studies.

Strengths

• Covers the entire province of Ontario.
• Includes a diverse set of over eight specific feature types like dams and waterfalls.
• Maintained and updated by a government authority, with a recent update in March 2026.

Limitations

• The exact number of features (rows) and spatial resolution are unknown.
• Specific attribute columns for each feature type are not documented.
• Requires proprietary GIS software for access and analysis, limiting tool-agnostic use.

Provenance

Source

Government of Ontario.

Freshness

Last updated on 2026-03-25.

Geography

Province of Ontario, Canada.