Documentation and How-to


Key resources used to develop DataStream features.

Last updated: April 10, 2024

Map layers

Watershed boundaries delineated on DataStream are consistent with Water Survey of Canada Sub-Drainage Areas (WSCSDA). To understand how these watersheds relate to other drainage areas in Canada, including major river and ocean drainage areas, and lower order watersheds, see Statistics Canada’s Standard Drainage Area Classification. These watersheds are also consistent with the work unit of the National Hydrographic Network.

The Atlantic DataStream boundary comprises all sub-drainage areas within New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador. Watersheds have not been clipped to provincial boundaries and in some cases overlap with Québec and the state of Maine.

Map layer sources

Contains information licensed under the Open Government Licence – Canada.

Natural Resources Canada (2016). National Hydro Network - NHN - GeoBase Series. (Dataset). Accessed on Open Government.

Transboundary watershed data extracted from a combined dataset for North America published by the Commission for Environmental Cooperation (CEC).

Commission for Environmental Cooperation (2011). North American Atlas – Basin Watersheds. (Dataset). Accessed on CEC.

Science explainers