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Quebec's estuarine and maritime coastal zones contain mapped polygons representing semi-vegetated (25-75%) and vegetated (75-100%) tidal marshes where marsh vegetation is dominant. The data was created by the University of Quebec at Rimouski and Fisheries and Oceans Canada for oil spill preparedness, primarily using photo-interpretation of aerial imagery from 2015-2020. Validation was performed using field stations visited between 2018 and 2020.
Available in multiple formats (HTML, ESRI REST, PDF, SHP, CSV); users must select the appropriate one for their GIS or analysis tools. License is Canadian Open Government Licence (ca-ogl-lgo). The master geodatabase is hosted on UQAR's SIGEC-Web platform, which may require separate access.