Recherche de motifs et cartographie des surfaces agricoles. Des relevés de terrain aux données satellitaires : application au Mali

La cartographie automatique de territoires ruraux est un outil essentiel dans le contexte societal actuel (e.g., analyse des risques de famine, etude des risques lies a la deforestation). Dans cet article, nous presentons une approche preliminaire de caracterisation des paysages ruraux et de leurs systemes de culture a partir de techniques de fouille de donnees (recherche d'itemsets frequents). Cette methode permet de coupler des donnees de releves terrain aux indicateurs extraits des images satellitaires. Cette approche a ete mise en ½uvre sur des donnees associees au Mali en collaboration avec des experts du domaine posant les premieres bases d'une methode originale d'extraction de motifs a partir de donnees complexes. / Countryside automatic cartography is a real and decisive challenge in the current societal context (e.g., the famine risk analysis, the deforestation consequence analysis). In this paper, we propose a preliminary approach allowing the landscape characterization. More precisely, an itemset-based-technique is developed to extract crop types features. One of the main strengths of the proposed methodology is to combine both indicators extracted from satellite image and data collected from a site survey. The approach was run on data associated to Mali in collaboration with some domain experts.

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