Regulatory Flood Elevation Steplines for Calgary Waterways

Step lines defining regulatory flood elevation levels for the Bow River, Elbow River, Nose Creek, and West Nose Creek. The dataset is provided by the City of Calgary for land planning and was last updated in June 2024. It includes geometric line features representing floodway and flood fringe boundaries.

Use Cases

• Identify properties within regulatory flood zones by joining the_geom features with parcel data.
• Calculate the total LENGTH of flood hazard boundaries for infrastructure planning and risk assessment.
• Model flood elevation changes along river sections using the step line geometry and associated annotation files.
• Enforce land use bylaws by verifying development proposals against the_geom-defined floodway and flood fringe zones.

Strengths

• Explicitly maps four major Calgary waterways: Bow River, Elbow River, Nose Creek, and West Nose Creek.
• Includes a separate annotation file providing official designated flood elevation levels.
• Last updated on 2024-06-27, indicating recent maintenance.

Limitations

• Unknown row count and dataset size limits scalability assessment.
• Spatial coverage is limited to the City of Calgary, not applicable to other regions.
• Requires joining with separate annotation files for full elevation data, adding complexity.

Provenance

Source

City of Calgary (data.calgary.ca).

Collection Method

Derived for regulatory mapping under Calgary's Land Use Bylaw.

Time Range

null

Freshness

Updated 2024-06 - 27.

Geography

Calgary, Alberta, Canada, focusing on specific river systems.