OHN - Data Capture Specification for Hydrographic Features (English, PDF)

View metadata and access the original English PDF file: OHN - Data Capture Specification for Hydrographic Features.

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Publisher-reported update: 2026-03-25

A feature is a representation of a real world object, such as a lake, stream, dam or rapid. There are three hydrographic feature classes: points, lines and polys. All may impede or be hazardous to waterflow and/or navigation on a watercourse or waterbody. This data shows natural and manmade poly features. Examples include: * break walls * dams * rapids * shipwrecks Technical Bulletin: Data migrated to new Ontario Hydro Network (OHN) - Hydrographic Feature Data Classes (PDF)

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Government of Ontario