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24 Shapes sur 12 secteurs pour couvrir toute la Guyane.
Le calcul des courbes topographiques a été fait tout les 10 m mais les courbes des 50 et 100m sont enregistrées séparément pour accélérer l'affichage.

Calculs effectués avec ArcGis après traitement avec l'extension "ArcHydroTools". Opération "fill sink" réalisée notamment de manière à éviter les incohérences topographiques (puits).

Le SRTM 30m avait été aussi découpé en 12 dalles avant traitement pour simplement permettre des temps de calcul honorable et des temps d'affichage honnêtes. L'utilisateurs a donc aussi la possibilité d'afficher uniquement les dalles qui l'intéressent.
 
Le plan d'assemblage est fourni.

Attention : il s'agit de courbes topographiques calculées sur un MNS, elles sont donc fausses par définition puisque calculées au niveau de la canopée. Elles sont néanmoins une aide précieuse pour se localiser en forêts sur les secteurs avec du relief et une végétation homogène. Le secteur littoral, plus perturbé et avec de nombreuses formations végétales basses doit contenir de nombreuses incohérences topographiques. Nous déconseillons donc son utilisation dans les zones littorales et de faibles reliefs.</gco:CharacterString>
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Les calculs ont été effectués avec ArcGis après traitement avec l'extension "ArcHydroTools". Opération "fill sink" réalisée notamment de manière à éviter les incohérences topographiques (puits).

Le SRTM 30m avait été aussi découpé en 12 dalles avant traitement pour simplement permettre des temps de calcul honorable et des temps d'affichage honnêtes. L'utilisateurs a donc aussi la possibilité d'afficher uniquement les dalles qui l'intéressent.</gco:CharacterString>
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