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                <term xml:lang="fr">Nantes métropole</term>
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              <p>The TEB model developed to assess adaptation strategies to climate change or urbanisation requires geomorphological input data of the urban environment, including land cover. The existing national databases are not directly adapted to the needs of the model. A methodology was therefore developed, based on the BD TOPO®, the BD OCS GE, hyperspectral data, and a description of urban blocks, in order to determine the data required for TEB. The methodology allows, after selection of the databases and definition of 5 types of land cover, to define a single type when several information overlap, and to define a mixed type of land cover when no type has been identified. Thus, initially 5.3% of the Nantes metropolitan area does not have a land cover type, the main missing data being the unbuilt impervious surfaces, followed by the vegetation data.</p>
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              <p>Le modèle TEB, développé pour évaluer les stratégies d'adaptation au changement climatique ou à l'urbanisation, nécessite des données d'entrée géomorphologiques du milieu urbain, dont l'occupation du sol. Les bases de données nationales existantes ne sont pas directement adaptées aux besoins du modèle. Une méthodologie a donc été développée, à partir de la BD TOPO®, de la BD OCS GE, de données hyperspectrales, et d'une description des îlots urbains, afin de déterminer les données nécessaires à TEB. La méthodologie permet, après sélection des bases de données et définition de 5 types d'occupation du sol, de définir un unique type lorsque plusieurs informations se recoupent, et de définir un type d'occupation du sol mixte lorsqu'aucun type n'a été initialement identifié. Ainsi, initialement 5,3% de la métropole nantaise ne possède pas de type d'occupation du sol, la donnée principalement manquante est les surfaces imperméabilisées non bâties, suivie de la donnée de végétation.</p>
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