DRELIO : Un drone hélicoptère pour le suivi des zones littorales

Marion JAUD, Christophe DELACOURT, Pascal ALLEMAND, Philippe GRANDJEAN, Jérôme AMMANN, Romain CANCOUËT, Anne DESCHAMPS, Eric VARREL, Véronique CUQ, Serge SUANEZ

Résumé


La connaissance du littoral, sa protection, son aménagement nécessitent un suivi des changements qui s’y produisent. Toutefois, en pratique, les techniques de mesures in situ ne peuvent être appliquées de façon systématique. Dans ce cas, les techniques de télédétection spatiale ou aérienne sont des approches complémentaires fournissant des images stéréoscopiques à partir desquelles, par des traitements photogrammétriques, on peut générer des orthophotographies et des MNT qui permettent de quantifier les changements morphosédimentaires. Mais actuellement, la résolution spatiale de ces MNT est insuffisante pour la plupart des applications littorales. En outre, dans le cas d’interventions consécutives à un événement extrême, ces systèmes manquent de souplesse (trajectoires prédéfinies, contraintes d’altitude, coût de mise en œuvre...) L’utilisation de plate-formes drones constitue donc une alternative intéressante pour des suivis de précision ou des interventions rapides.

 

Abstract:

To get to know, to protect and to manage coastal area, a regular monitoring of its variation is needed. Nevertheless, for practical purposes, in situ measurements could not be carried out systematically. Thus, spatial or aerial remote sensing techniques are complementary methods. After an appropriate photogrammetric processing chain, orthophotographies and DEM can be provided from the multi-temporal stereoscopic images acquired in this way. Such results allow to quantify morphosedimentary changes. But, at the present time, the spatial resolution of these DEM is insufficient for most of the applications on the littoral fringe. Moreover, to collect data after severe event, these systems are not flexible enough (predefined path, confines on flight altitude, cost of implementing...). The use of drones is so an interesting alternative for an accurate monitoring or rapid response.

Keywords: Remote Sensing; DEM; Stereorestitution; Photogrammetry; Beach monitoring


Mots-clés


Télédétection; MNT; Drone; Stéréorestitution; Photogrammétrie; Suivi de plages.

Texte intégral :

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Références


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DOI: http://dx.doi.org/10.5150/revue-paralia.2014.s02

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