Description

This dataset provides treed area dynamics across Canada's 650 Mha forested ecosystems from 1984 to 2022, derived from Landsat-based annual land cover layers at a 30-m spatial resolution. It is developed within the framework of Canada’s National Terrestrial Ecosystem Monitoring System (NTEMS). This dataset identifies areas that remained treed, transitioned to treed (newly treed), or transitioned to other cover that is not treed vegetation (was-treed). The data enable national and regional assessments of long-term changes in treed area, capturing trends in treed area, post-disturbance recovery, and shifts in forest extent. When using this data, please cite as: Hermosilla, T., Wulder, M.A., White, J.C., Bater, C.W., Baral, S.K., Leach, J.A., 2025. Expansion of treed area over Canada’s forested ecosystems: spatial and temporal trends. Forestry: An International Journal of Forest Research 98(5) 786-799. https://doi.org/10.1093/forestry/cpaf015. (Hermosilla et al. 2025)

Resources

Name	Format	Description	Link
Expansion of treed area over Canada’s forested ecosystems: spatial and temporal trends	PDF		https://academic.oup.com/forestry/article/98/5/786/8104860
CA_treed_area_1984-2022.zip	ZIP		https://opendata.nfis.org/downloads/forest_change/CA_treed_area_1984-2022.zip
CA_treed_area_1984-2022	WMS		https://opendata.nfis.org/mapserver/cgi-bin/wms_change.cgi?request=GetCapabilities&service=WMS&version=1.3.0&layers=CA_treed_area_1984-2022&legend_format=image%2Fpng&feature_info_type=text%2Fhtml
CA_treed_area_1984-2022	WMS		https://opendata.nfis.org/mapserver/cgi-bin/wms_change_fra.cgi?request=GetCapabilities&service=WMS&version=1.3.0&layers=CA_treed_area_1984-2022&legend_format=image%2Fpng&feature_info_type=text%2Fhtml
Satellite Forest Information for Canada (English)	HTML		https://opendata.nfis.org/mapserver/nfis-change_eng.html
Satellite Forest Information for Canada (French)	HTML		https://opendata.nfis.org/mapserver/nfis-change_fra.html
A nationwide annual characterization of 25 years of forest disturbance and recovery for Canada using Landsat time series	HTML		http://www.sciencedirect.com/science/article/pii/S0034425717301360

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