Dynamic Surface Water Maps of Canada from 1984-2023 Landsat Satellite Imagery

Knowledge of the location of Earth’s surface water in time and space is critical to inform policy decisions on environment, wildlife, and human security. Dynamic surface water maps generally represent water occurrence, also referred to as inundation frequency, depicting the percentage of valid observations when water is detected at the surface. The location and duration of surface water varies from areas of permanent water with 100% inundation frequency where water is always observed, to areas of permanent land with 0% inundation where water never occurs. Between these two extremes are areas of ephemeral water that experience periodic flooding with inundation frequencies between 0-100%. National-scale dynamic surface water information was generated for years 1984-2023 at 30m spatial resolution from the historical Landsat archive over Canada. The complete dataset consists of annual water maps and derived products including inundation frequency and inter-annual wetting and drying trends calculated using per-pixel logistic regression. The complete dataset enables an assessment of the timing, duration, and trends towards wetting or drying at regional to national scales.

Associated publication:

https://www.sciencedirect.com/science/article/pii/S0034425722002358

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Champ Valeur
Dernière modification avril 17, 2026, 19:09 (TU)
Créé le avril 17, 2026, 19:09 (TU)
contact_email ian.olthof@ec.gc.ca
contact_person {"fr": "Gouvernement du Canada;Ressources naturelles Canada;Centre canadien de cartographie et d'observation de la Terre,thomas.rainville@nrcan-rncan.gc.ca", "en": "Government of Canada;Natural Resources Canada;Canada Centre for Mapping and Earth Observation,,thomas.rainville@nrcan-rncan.gc.ca"}
criticality_level []
data_dictionary ["geoscientific_information", "inland_waters"]
geographic_scope []
open_canada_collection fgp
open_canada_date_modified 2024-01-01 00:00:00
open_canada_date_published 2022-01-01 00:00:00
open_canada_keywords {"fr": ["fréquence d'inondation", "télédétection", "Landsat", "eau", "zones humides", "gestion de l'eau", "inondations", "Canada", "Amérique du Nord", "Hémisphère ouest", "Hémisphère nord", "Eau", "Zone humide", "Gestion de l'eau", "Conservation de l'eau", "Inondation", "Données géographiques", "Télédétection"], "en": ["inundation frequency", "remote sensing", "Landsat", "water", "wetlands", "water management", "floods", "Canada", "North America", "Western Hemisphere", "Northern Hemisphere", "Water", "Wetlands", "Water management", "Water conservation", "Floods", "Geographic data", "Remote sensing"]}
open_canada_subject ["form_descriptors", "nature_and_environment", "science_and_technology"]
sensitivity_level unrestricted
title_fr Cartes des eaux de surface dynamiques du Canada à partir d'imagerie satellite Landsat de 1984 à 2023
update_frequency as_needed