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Are you interested in historic flood events? NRCan team publishes Historical Flood Events Data Layer

With scattered publication records stretching back to 1696, it has been labour intensive to search publications to determine historical flood events for a specific region – until now. With over 1400 flood events documented in over 7000 locations, the NRCan Historical Flood Events data layer provides an accessible way to view the who, what, when, and where of historical flood events in Canada.

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New High-Resolution Digital Elevation Model and building footprints derived from LiDAR data available on Open Maps !

November 9, 2021

Natural Resources Canada (NRCan) is pleased to announce the release of a range of new LiDAR-derived data on Open Maps – with data from numerous government organizations across the country.

More than 100,000 km2 of new High Resolution Digital Elevation Models (HRDEM) have been added to the HRDEM and HRDEM Mosaic products. New data are located in the provinces of British Columbia, Manitoba, Ontario, Quebec, Prince Edward Island, and the Northwest Territories. The total coverage of LiDAR-derived HRDEM and HRDEM Mosaic data is now nearly 600,000 km2 and covers 84 of the 100 largest Canadian cities!

In addition, a new visualization tool for the HRDEM Mosaic product is now available and provides quick and easy access to the HRDEM Mosaic and all of its derived products. A new and efficient way to view the most accurate elevation data in the country!

For more information on the HRDEM product, consult the product specifications or the download procedure. The HRDEM Mosaic product specifications are available here.

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High-Resolution Digital Elevation Model (HRDEM) generated from LiDAR – New data available!

June 22, 2021

Natural Resources Canada (NRCan) is pleased to announce the release of over 100,000 km2 of new data in the High-Resolution Digital Elevation Model (HRDEM) and HRDEM Mosaic. The total area of high-resolution elevation data derived from LiDAR is now nearly 500,000 km². The data is distributed across eight provinces: British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland and Labrador (see map below).

With the addition of this data, 61 of Canada's 100 largest cities are covered by the HRDEM product and the HRDEM Mosaic. This includes the entire area of both the National Capital Region and the Ottawa River, areas that are highly vulnerable to flooding. The 10,000 km2 project was carried out in collaboration with the City of Ottawa, the City of Gatineau, NRCan, the National Capital Commission (NCC) and the Province of Ontario and supported by the Emergency Management Strategy for Canada.

This highly detailed 3D information provides essential foundational geospatial data for many government projects and priorities, such as flood mapping, forest inventories, climate change monitoring and urban management.

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National Hydro Network (NHN) - 45 new watersheds (WS)

April 6th, 2021

Summary : 45 NHN-CL3 watersheds are published.

With the publication of these new watersheds, over 90% of watersheds covering Canada allow for better analysis of hydrological networks.

Details:

  • All 44 of Nova Scotia’s watersheds have been updated with provincial data,
  • 1 Canada/USA bi-national watersheds was regenerated.

We are in the process of restructuring the NHN model. This is the last release of the NHN in its current form.

For more information about the Hydrographic Network Quality, please refer to the Completeness Level.

Publication map

This map shows the hydrographic watersheds affected by this release.

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New Automatically Extracted Buildings are available on Open Maps!

February 8, 2021

Natural Resources Canada's Automatically Extracted Building product now includes more than 2 million buildings.

The footprint, elevation and height of buildings are automatically extracted from LiDAR data collected from the National Elevation Data Strategy developed in collaboration with various partners.

Recent additions include more than 300,000 buildings in the St. Lawrence Valley between Montreal and Trois-Rivières as well as more than 200,000 additional buildings across Canada.

Explore the data!

You can access Automatically Extracted Buildings data and documentation from the Open Government Portal. The data is available free of charge under the Open Government Licence of Canada either by download or through a Web Map Service.

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National Hydro Network (NHN) - 245 new watersheds (WS)

October 15, 2020

Summary : Publication of 245 NHN datasets including: 74 NHN-CL3 watersheds.

With the publication of these new watersheds, nearly 20% of watersheds covering Canada has been improved, allowing better analysis of hydrological networks.

Details:

  • 4 watersheds have been updated, using orthophotos and imagery (05OD000, 05OH001, 05OH002 and 05OG000)
  • 10 Canada/USA bi-national watersheds were regenerated
  • 74 watersheds have been improved into NHN-CL3
  • 8 watersheds were produced to correct anomalies.

Furthermore, in maintenance effort, 149 watersheds were re-generated following watershed limits redefinitions.

For more information about the Hydrographic Network Quality, please refer to the Completeness Level.

Publication map

This map shows the hydrographic watersheds affected by this release.

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