Inland Electronic Navigational Charts for U.S. Waterways

Inland Electronic Navigational Charts are vector datasets updated bi-monthly by the US Army Corps of Engineers and Army Geospatial Center. They provide geospatial features for U.S. inland waterways, integrated into the National Transportation Atlas Database.

Use Cases

• Analyze geospatial feature classes from the IENC web service for waterway infrastructure mapping.
• Integrate vector data layers into an Electronic Chart Display Information System (ECDIS) for inland navigation planning.
• Assess attribute accuracy of chart features against real-time waterway condition reports.

Strengths

• Data is updated on a bi-monthly delivery cycle, with partial updates on the 1st and 15th business days.
• Managed by authoritative sources: US Army Corps of Engineers, Army Geospatial Center, and the Bureau of Transportation Statistics.
• Covers inland waterways across the Continental United States.

Limitations

• The source notes features and attributes may have significant inaccuracies due to changing conditions or approximations.
• Data is only suitable for navigation when used in official ECDIS/ECS systems or chart books from the USACE server.
• Specific metrics like row count, file size, and column schema are not provided in the input.

Provenance

Source

U.S. Department of Transportation, Bureau of Transportation Statistics, US Army Corps of Engineers, Army Geospatial Center.

Collection Method

Developed from data used in navigation channel maintenance, compiled into vector charts.

Time Range

null

Freshness

Updated bi-monthly; last metadata update recorded as 2026-02-03.

Geography

Continental United States inland waterways.