a4d54914-073f-4b2e-b9e6-43cab3c465bd Volto Natacha LIttoral ENvironnement et Sociétés 2 rue Olympe de Gouges France La Rochelle 17000 France natacha.volto@univ-lr.fr author Dupuy Christine LIttoral ENvironnement et Sociétés 2 rue Olympe de Gouges France La Rochelle 17000 France christine.dupuy@univ-lr.fr pointOfContact Volto Natacha LIttoral ENvironnement et Sociétés natacha.volto@univ-lr.fr pointOfContact Lachaussee Nicolas LIttoral ENvironnement et Sociétés nicolas.lachaussee@univ-lr.fr pointOfContact Service d'Aide à la Gestion de la Donnée LIttoral ENvironnement et Sociétés 2 rue Olympe de Gouges France La Rochelle 17000 France contact-data-lienss@univ-lr.fr pointOfContact Pôle ODATIS NA NA contact@odatis-ocean.fr publisher 2026-03-31T10:05:07.033614Z ISO 19115-3 - SEXTANT 1.0 2154 EPSG Orthomosaics of the Esnandes Salt Marsh (~1 km²) acquired in September 2024 and September 2025 2026-03-06T09:59:34 revision 2026-03-06 creation 2026-03-06 publication 1.0 2022-11-13T09:00:00 a4d54914-073f-4b2e-b9e6-43cab3c465bd Orthomosaics of the study area were generated by drones on 19 September 2024 and 18 September 2025. They were created from 895 images (2024) and 1,282 images (2025), captured at altitudes of 120 meters (2024) and 100 meters (2025) using the DJI Mavic 3E RTK (2024) and Mavic 3M RTK (2025) drones. The ground resolutions were 3.19 cm/pixel (2024) and 2.63 cm/pixel (2025). The surveyed area covers approximately 1 km², and the orthomosaics were resampled to a resolution of 10 cm/pixel. LIttoral ENvironnement et Sociétés - La Rochelle Université / CNRS completed Lachaussee Nicolas LIttoral ENvironnement et Sociétés 2 rue Olympe de Gouges France La Rochelle 17000 France nicolas.lachaussee@univ-lr.fr author Volto Natacha LIttoral ENvironnement et Sociétés natacha.volto@univ-lr.fr author Volto Natacha LIttoral ENvironnement et Sociétés natacha.volto@univ-lr.fr pointOfContact Dupuy Christine LIttoral ENvironnement et Sociétés christine.dupuy@univ-lr.fr pointOfContact Service d'Aide à la Gestion de la Donnée LIttoral ENvironnement et Sociétés 2 rue Olympe de Gouges France La Rochelle 17000 France contact-data-lienss@univ-lr.fr pointOfContact Pôle ODATIS NA NA contact@odatis-ocean.fr publisher https://sextant.ifremer.fr/geonetwork/srv/api/records/a4d54914-073f-4b2e-b9e6-43cab3c465bd/attachments/pre-sale-esnandes-sept2024.jpg RTK ; Salt March; ESA Coastal Blue Project Orthoimagery GEMET - INSPIRE themes, version 1.0 2018-07-27T14:39:48 publication 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme GEMET - Concepts, version 2.4 2010-01-13 publication geonetwork.thesaurus.external.theme.gemet Shoreline ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 /Observational data Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-SA (Creative Commons - Attribution, Partage dans les mêmes conditions) 76fdccf4-f0a4-4b12-866d-98b66ea59dff grid 10 utf8 -1.14370968 -1.12323401 46.25317306 46.26362545 tableDigital v1.1 Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T12:00:00 publication See the referenced specification true COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata 2008-12-03T12:00:00 publication See the referenced specification true RGB images acquired using the Mavic 3E RTK and Mavic 3M RTK drones from the LIENSs UAV plateform.The drone acquisitions were carried out by Nicolas Lachaussée (2024) and Natacha Volto (2025) from the LIENSs UMR Drone Platform. Photogrammetric processing was performed by Natacha Volto (LIENSs) using Agisoft Metashape software. These drone surveys were conducted as part of the ESA Coastal Blue Project, coordinated by Christine Dupuy at the LIENSs Laboratory.