Canadian Hydrographic Service Non-Navigational (NONNA) Bathymetric Data

CHS NONNA data has been updated: May 29, 2024

The Canadian Hydrographic Service (CHS) offers a complete inventory of bathymetric data free to the general public for non-navigational use called 'CHS NONNA' for the 'NON-NAvigational' purpose of the data. The product is available in a spatial resolution of 10 metres or 100 metres.

To directly access the CHS NONNA Data Portal please follow this link - https://data.chs-shc.ca/login

(Note: The data portal is NOT compatible with Internet Explorer browser).

Terms of Use

The Canadian Hydrographic Service (CHS) NONNA Data products are for NON-NAVIGATIONAL USE ONLY. Please see the Open Data Licence below and the CHS NONNA LICENCE viewable on https://data.chs-shc.ca/login and downloadable with the NONNA data, for the full terms and conditions governing the use of this data.

----- PRODUCT DESCRIPTION -----

The CHS NONNA-10 NONNA-100 and NONNA Package Bathymetric Data products represent a consolidation of digital bathymetric sources managed by the CHS in Canadian jurisdiction.

The « NONNA » refers to NON-NAvigational.

The « 10 » or « 100 » references the approximate resolution (in metres) of the data.

NONNA Packages

A NONNA Package is a ZIP file containing a collection of NONNAP datasets to ease the download of large amounts of high resolution data. Packages are currently available for data sources of approximately 10 metre resolution.

The «P10 » refers to the Packages and approximate resolution (in metres) of the data.

The CHS NONNA-10 individual product coverage (resolution) is as follows: 

 • South of 68°N the products = 0.1° latitude X 0.1° longitude (0.0001 degrees)

 • 68°N-80°N the products = 0.1° latitude X 0.2° longitude (0.0002 degrees)

 • 80°N and north the products = 0.1° latitude X 0.4° longitude (0.0004 degrees)

The CHS NONNA-100 individual product coverage (resolution) is as follows: 

 • South of 68°N the products = 1° latitude X 1° longitude (0.001 degrees)

 • 68°N-80°N the products = 1° latitude X 2° longitude (0.002 degrees)

 • 80°N and north the products = 1° latitude X 4° longitude (0.004 degrees)

The CHS NONNA-P10 Packages are ZIP files that contain product coverage (resolution) defined as: 

 • South of 68°N the products = 1° latitude X 1° longitude (0.0001 degrees)

 • 68°N-80°N the products = 1° latitude X 2° longitude (0.0002 degrees)

 • 80°N and north the products = 1° latitude X 4° longitude (0.0004 degrees)

----- DATUM -----

All CHS NONNA data sources are horizontally referenced to the World Geodetic System 1984 (WGS84) ESPG:4326 and vertically referenced to Chart Datum (CD), a tidal or water level datum that is locally derived and, of which, the depth of water should seldom fall below. For more information on vertical references visit:

https://tides.gc.ca/tides/en/vertical-datum-chart-references

----- DATA PRESENTATION -----

CHS NONNA products adhere to the following naming convention: NONNAXXX_SouthwestCorner Example: NONNAP10_4360N07940W 

 • NONNAP10 = the product NONNAP10

 • 4360N07940W = the southwest corner of the NONNA cell.

These products are available to view, query and download via the CHS NONNA Data Portal. The following formats are available for download:

• 32-bit GeoTIFF

• ASCII++ (XYZ)

• CSAR

• BAG

These formats can be opened using various GIS applications.

Alternatively, the CHS NONNA products can be accessed via Web Map Service (WMS), Web Coverage Service (WCS) or Web Map Tile Service (WMTS) links:

WMS https://nonna-geoserver.data.chs-shc.ca/geoserver/wms?request=GetCapabilities

WMTS https://nonna-geoserver.data.chs-shc.ca/geoserver/gwc/service/wmts?request=GetCapabilities

WCS https://nonna-geoserver.data.chs-shc.ca/geoserver/wcs?request=GetCapabilities

Note

Gaps in the data may be visible where modern surveys have not yet been conducted, the data is not updated to Chart Datum (CD) or where legacy data has not yet been digitized. In addition, there may be data sources removed from the Data Portal for further processing in the CHS’ Bathymetric Database, and will not be available until such work is complete.

Data sources included in the NONNA products may not have been subjected to the same level of quality assurance as those in official navigational products.

Help

New users of the CHS NONNA Data Portal are encouraged to fully review the 'CHS NONNA Data Portal Guidance Document' (PDF) which is available below in the RESOURCES section of this page.

Datasets available for download

Additional Info

Field Value
Last Updated October 22, 2024, 15:34 (UTC)
Created October 1, 2024, 07:22 (UTC)
Domain / Topic
Domain or topic of the dataset being cataloged.
Inland Waters, Oceans
Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date
Published date of the dataset.
2018-10-11
Time Period Data Span (start date)
Start date of the data in the dataset.
Time Period Data Span (end date)
End date of time data in the dataset.
GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
Field Value
Access category
Type of access granted for the dataset (open, closed, service, etc).
Limits on use
Limits on use of data.
Location
Location of the dataset.
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
Fisheries and Oceans Canada | Pêches et Océans Canada
Contact Point
Who to contact regarding access?
Government of Canada; Fisheries and Oceans Canada; Canadian Hydrographic Service, chsinfo@dfo-mpo.gc.ca
Publisher
Publisher of the dataset.
Publisher Email
Email of the publisher.
chsinfo@dfo-mpo.gc.ca
Accessed At
Date the data and metadata was accessed.
Field Value
Identifier
Unique identifier for the dataset.
Language
Language(s) of the dataset
Link to dataset description
A URL to an external document describing the dataset.
Persistent Identifier
Data is identified by a persistent identifier.
Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
Contains data about individuals
Does the data hold data about individuals?
Contains data about identifiable individuals
Does the data hold identifiable data about individual?
Contains Indigenous Data
Does the data hold data about Indigenous communities?
Field Value
Source
Source of the dataset.
https://open.canada.ca/data/en/dataset/d3881c4c-650d-4070-bf9b-1e00aabf0a1d
Version notes
Version notes about the dataset.
Is version of another dataset
Link to dataset that it is a version of.
Other versions
Link to datasets that are versions of it.
Provenance Text
Provenance Text of the data.
Provenance URL
Provenance URL of the data.
Temporal resolution
Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
Field Value
Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission
Community permission (who gave permission).
The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
Field Value
Number of data rows
If tabular dataset, total number of rows.
Number of data columns
If tabular dataset, total number of unique columns.
Number of data cells
If tabular dataset, total number of cells with data.
Number of data relations
If RDF dataset, total number of triples.
Number of entities
If RDF dataset, total number of entities.
Number of data properties
If RDF dataset, total number of unique properties used by the triples.
Data quality
Describes the quality of the data in the dataset.
Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.

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