Canadian National Wetlands Inventory

Canadian National Wetlands Inventory is an open dataset from Environment and Climate Change Canada with 10 files (ESRI REST, PDF, WMS, XLSX, FGDB/GDB); catalogue record updated 2025-10-15. On CanQuery you can open 2 CSV or Excel files as tables, filter, chart and export up to 10,000 rows as CSV and follow the original downloads. Files are available in English and French.

The Canadian National Wetlands Inventory (CNWI) is a comprehensive, publicly available national geodatabase developed by the Canadian Wildlife Service (CWS) of Environment and Climate Change Canada (ECCC), in collaboration with federal, provincial, and territorial governments, academia, Indigenous groups, and Non-Governmental Organizations (NGOs). It consists of the best available wetland mapping data, along with its metadata, published in a standardized manner. The CNWI is continuously updated through the compilation of existing data and the acquisition of new high-resolution datasets to address coverage gaps, with an emphasis on peatlands and coastal wetlands, which are key habitats for greenhouse gas (GHG) sequestration. ECCC plans to use the CNWI to train and validate machine-learning algorithms to delineate and classify wetlands at a national scale and to measure trends over time. This will directly support Canada’s Nature-Based Climate Solutions by informing biodiversity conservation, guiding climate change mitigation and adaptation strategies, and supporting GHG emissions reporting. The CNWI was initially released in February 2024 with 13 source datasets. In June 2025, the…

Publisher

Environment and Climate Change Canada

Resources

10

Catalogue metadata updated

2025-10-15