{"title":"Plan d'assemblage des dalles 20km * 20 km","owner":{"type":"organization","id":"MSp7KVXyY","name":"Département des Côtes d'Armor","department":"Lannion Tregor Commu","departmentName":"Lannion Trégor Communauté"},"schema":[{"type":"string","key":"geometry","x-originalName":"geometry","x-refersTo":"https://purl.org/geojson/vocab#geometry","x-concept":{"id":"geometry","title":"Géométrie GeoJSON ou WKT","primary":true},"description":""},{"key":"nom","x-originalName":"nom","type":"string","x-cardinality":34,"description":""},{"key":"x","x-originalName":"x","type":"integer","x-cardinality":12,"enum":[272000,132000,152000,172000,192000,212000,232000,252000,92000,112000,292000,312000],"description":""},{"key":"y","x-originalName":"y","type":"integer","x-cardinality":5,"enum":[6857000,6837000,6877000,6897000,6917000],"description":""},{"key":"type_ta","x-originalName":"type_ta","type":"string","x-cardinality":1,"enum":[".jp2"],"description":""},{"x-calculated":true,"key":"_geoshape","type":"object","title":"Géométrie","description":"Au format d'une géométrie GeoJSON"},{"x-calculated":true,"key":"_geocorners","type":"array","title":"Boite englobante de la géométrie","description":"Sous forme d'un tableau de coordonnées au format \"lat,lon\""},{"x-calculated":true,"key":"_geopoint","type":"string","title":"Coordonnée géographique","description":"Centroïde au format \"lat,lon\"","x-refersTo":"http://www.w3.org/2003/01/geo/wgs84_pos#lat_long","x-concept":{"id":"latLon","title":"Latitude / Longitude","primary":true}},{"x-calculated":true,"key":"_id","type":"string","format":"uri-reference","title":"Identifiant","description":"Identifiant unique parmi toutes les lignes du jeu de données"},{"x-calculated":true,"key":"_i","type":"integer","title":"Numéro de ligne","description":"Indice de la ligne dans le fichier d'origine"},{"x-calculated":true,"key":"_rand","type":"integer","title":"Nombre aléatoire","description":"Un nombre aléatoire associé à la ligne qui permet d'obtenir un tri aléatoire par exemple"}],"createdBy":{"id":"MSp7KVXyY"},"createdAt":"2023-11-14T11:27:21.036Z","updatedBy":{"id":"rJytCgDTf"},"updatedAt":"2026-07-01T08:20:14.631Z","dataUpdatedBy":{"id":"apiKey:QsU6yCHgyXq4fj-SOIvK-"},"dataUpdatedAt":"2026-03-05T00:45:03.146Z","status":"finalized","description":"Entre 2011 et 2014, une succession de prise de vues du littoral français métropolitain est réalisée en vue d'établir une couverture d'orthophotographies sur tout son linéaire. La production de cette orthophotographie s'effectue au rythme des campagnes de vols. Ces dernières ne peuvent être réalisées que sous des conditions bien particulières : à marée basse en période de grande marée avec une hauteur d’eau inférieure à 1 mètre dans des conditions anticycloniques (> 1013hPa) établies depuis au moins 48 heures. Cette couverture orthophotographique est découpée en dalles 20*20km et est disponible en libre téléchargement sur le site Géolittoral dans le format JPEG2000 en RVB et Infrarouge couleur. Le téléchargement se fait par lot de dalles d'environ 600Mo chacun. Le système de projection associé est le RGF93 / Lambert93. Cette couche détermine le plan d'assemblage des dalles 20*20km réalisées en Infrarouge couleur sur tout le littoral français métropolitain continental. 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