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ShoreZone data has been shown to underestimate the presence of eelgrass and the ability of ShoreZone to map the presence of eelgrass depends on eelgrass being visible in the intertidal and shallow subtidal region during the low tide imagery acquisition, therefore deeper subtidal beds are missed. ShoreZone data, and therefore these modeled outputs, represents a snapshot in time. Given known long-term dynamics of eelgrass meadows, these data do not indicate areas that have undergone losses or gains in eelgrass extent. 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Cet ensemble de donn\\u00e9es a \\u00e9t\\u00e9 g\\u00e9n\\u00e9r\\u00e9 entre 2016 et 2017 dans le cadre des efforts de la Commission de coop\\u00e9ration environnementale visant \\u00e0 estimer le stockage du carbone bleu dans les prairies de zost\\u00e8res du nord-ouest du Pacifique. Pour mod\\u00e9liser l'\\u00e9tendue spatiale de la Colombie-Britannique, un nouvel outil a \\u00e9t\\u00e9 cr\\u00e9\\u00e9 pour \\u00eatre utilis\\u00e9 dans ArcGIS. Cet outil n\\u00e9cessitait deux entr\\u00e9es\\u00a0: (1) les donn\\u00e9es c\\u00f4ti\\u00e8res de Shorezone (c'est-\\u00e0-dire des caract\\u00e9ristiques vectorielles avec des attributs sur la pr\\u00e9sence ou l'absence de zost\\u00e8re marine le long d'une \\u00e9tendue lin\\u00e9aire du littoral) et (2) des donn\\u00e9es bathym\\u00e9triques. En bref, chaque segment de c\\u00f4te de ShoreZone a \\u00e9t\\u00e9 converti en points situ\\u00e9s le long de ses sommets et les points ont \\u00e9t\\u00e9 utilis\\u00e9s pour g\\u00e9n\\u00e9rer des polygones de Thiessen. Les polygones de Thiessen ont \\u00e9t\\u00e9 d\\u00e9coup\\u00e9s selon un contour bathym\\u00e9trique s\\u00e9lectionn\\u00e9 (5 m ou 3 m) sur la base des r\\u00e9sultats d'une analyse bathym\\u00e9trique r\\u00e9gionale. 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