Canadian Bathymetric Data at 10-Meter Resolution

The Canadian Hydrographic Service provides bathymetric data at 10-meter or 100-meter spatial resolution for non-navigational use. These products consolidate digital depth sources across Canadian jurisdiction, with horizontal referencing to WGS84 and vertical referencing to local Chart Datum. Data is organized into individual NONNA-10, NONNA-100, or packaged NONNA-P10 files with coverage varying by latitude.

Use Cases

• Model seafloor topography using bathymetric data at 10-meter or 100-meter resolution for coastal research.
• Analyze spatial coverage patterns across different latitude bands (south of 68°N, 68°N-80°N, north of 80°N) to assess data density.
• Integrate bathymetric data referenced to WGS84 ESPG:4326 with other geospatial datasets for marine spatial planning.
• Process NONNA-P10 package ZIP files to efficiently handle large collections of high-resolution bathymetric datasets.

Strengths

• Data is provided at two specific spatial resolutions: 10 meters and 100 meters.
• Coverage is defined for three distinct latitude zones, providing structured spatial extents.
• Horizontal and vertical datums (WGS84 ESPG:4326 and local Chart Datum) are explicitly documented.

Limitations

• The dataset is explicitly for non-navigational use only, limiting its application in safety-critical maritime operations.
• Specific metrics like total file size, row count, and column structure are not provided in the description.
• Data presentation involves multiple file formats (PDF, WMS, WMTS, WCS, SHP, HTML), which may require specialized tools for unified analysis.

Provenance

Source

Canadian Hydrographic Service (CHS), part of Fisheries and Oceans Canada.

Collection Method

Consolidation of digital bathymetric sources managed by CHS within Canadian jurisdiction.

Freshness

The data portal was last updated on March 30, 2025, and the metadata record was last updated on March 24, 2026.

Geography

Canadian jurisdictional waters, with coverage details specified for regions south of 68°N, 68°N-80°N, and north of 80°N.