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            <gco:CharacterString>Le projet Litto3D® assure en partenariat avec l’IGN la production d'informations bathymétriques et topographiques fines en métropole pour satisfaire les besoins des acteurs et gestionnaires du littoral marin et terrestre.</gco:CharacterString>
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            <gco:CharacterString>Le programme national Litto3D® vise à la production d’un modèle numérique altimétrique de référence continu terre-mer sur la frange littorale. Il s’agit de réaliser des relevés de relief et des mesures de profondeurs marines pour une connaissance précise de l’ensemble des zones métropolitaines et outre-mer (Guadeloupe, Martinique, La Réunion, Guyane, Mayotte et Saint-Pierre-et-Miquelon).
La bande littorale concernée :
- en mer, jusqu’à la courbe bathymétrique continue de profondeur 10 m et au plus jusqu’à 6 milles des côtes.
- sur terre, jusqu’à l’altitude +10 m, et à au moins 2 km à l’intérieur des terres.
Au total, l’emprise du programme représente environ 45 000 km².</gco:CharacterString>
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                        <gmd:LocalisedCharacterString locale="#EN">Sea</gmd:LocalisedCharacterString>
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               <gmd:keyword xsi:type="lan:PT_FreeText_PropertyType">
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                     <gmd:textGroup>
                        <gmd:LocalisedCharacterString locale="#EN">Land-sea continuity</gmd:LocalisedCharacterString>
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                  <gco:CharacterString>Modèle numérique</gco:CharacterString>
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                        <gmd:LocalisedCharacterString locale="#FR">Modèle numérique</gmd:LocalisedCharacterString>
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                     <gmd:textGroup>
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                        <gmd:LocalisedCharacterString locale="#FR">Semi de points</gmd:LocalisedCharacterString>
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                     <gmd:textGroup>
                        <gmd:LocalisedCharacterString locale="#EN">Scatter diagram</gmd:LocalisedCharacterString>
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                              <gco:Date>2019-10-16</gco:Date>
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            <gmd:MD_Keywords>
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                        <gco:CharacterString>DCSMM : Type d'espace concerné</gco:CharacterString>
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                        </gmd:PT_FreeText>
                     </gmd:title>
                     <gmd:date>
                        <gmd:CI_Date>
                           <gmd:date>
                              <gco:Date>2014-12-11</gco:Date>
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                              <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode"
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                  </gmd:CI_Citation>
               </gmd:thesaurusName>
            </gmd:MD_Keywords>
         </gmd:descriptiveKeywords>
         <gmd:descriptiveKeywords>
            <gmd:MD_Keywords>
               <gmd:keyword xsi:type="lan:PT_FreeText_PropertyType">
                  <gco:CharacterString>D7: Changements hydrographiques</gco:CharacterString>
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                        <gmd:LocalisedCharacterString locale="#FR">D7: Changements hydrographiques</gmd:LocalisedCharacterString>
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                     <gmd:textGroup>
                        <gmd:LocalisedCharacterString locale="#EN">D7: Hydrographical Conditions</gmd:LocalisedCharacterString>
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                              <gco:Date>2020-04-09</gco:Date>
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                  <gco:CharacterString>Télédétection</gco:CharacterString>
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                        <gco:CharacterString>DCSMM : Méthodes de recueil des données</gco:CharacterString>
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                           <gmd:date>
                              <gco:Date>2014-12-11</gco:Date>
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         <gmd:descriptiveKeywords>
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                  <gco:CharacterString>/Milieu physique/Bathymétrie/MNT</gco:CharacterString>
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Le référentiel Litto3D®, intégrant partie terrestre et partie maritime, est diffusé sous licence Opendata « Licence Ouverte » (version 1.0 d’octobre 2011), définie par la mission Etalab.</gco:CharacterString>
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Le référentiel Litto3D®, intégrant partie terrestre et partie maritime, est diffusé sous licence Opendata « Licence Ouverte » (version 1.0 d’octobre 2011), définie par la mission Etalab.</gmd:LocalisedCharacterString>
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The Litto3D® repository, integrating land part and sea part is released under license OpenData "Open License" (1.0 October 2011), defined by the Etalab mission.</gmd:LocalisedCharacterString>
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Etat	2005
IGN	2005
SHOM 2005
Communauté d’agglomérations TPM 2007
EPA – EPIC partenaires 2009
Collectivités territoriales (Régions, Départements)	2009

Maîtres d'œuvre :
SHOM / IGN  2005

Financeur(s) :
Etat	2005
IGN	2005
SHOM 2005
Communauté d’agglomérations 2007
EPA – EPIC partenaires	2009
Collectivités territoriales (Régions, Départements)	2009
Europe (FEDER) 2010</gco:CharacterString>
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                              <gco:CharacterString>Inspire specifications</gco:CharacterString>
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                                    <gmd:LocalisedCharacterString locale="#FR">Inspire specifications</gmd:LocalisedCharacterString>
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                           <gmd:date>
                              <gmd:CI_Date>
                                 <gmd:date>
                                    <gco:Date>2012-01-16</gco:Date>
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                                    <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode"
                                                         codeListValue="creation">creation</gmd:CI_DateTypeCode>
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                        </gmd:CI_Citation>
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                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#EN">Non assessed</gmd:LocalisedCharacterString>
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                     </gmd:explanation>
                     <gmd:pass>
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         <gmd:lineage>
            <gmd:LI_Lineage>
               <gmd:statement xsi:type="lan:PT_FreeText_PropertyType">
                  <gco:CharacterString>2005 : 1er démonstrateur Litto3D SHOM Golfe du Morbihan
2007 : 1er démonstrateur Litto3D IGN-SHOM Toulon-Provence-Méditerranée (TPM)
2009 – 2012 : Début de la production (Océan Indien et France métropolitaine)  

La base de données Litto3D® s’étend sur la frange littorale des zones concernées, selon les critères suivants :
- En mer, jusqu’à la courbe bathymétrique continue de profondeur 10 m (ligne « CB10 ») dans la limite de la zone de responsabilité hydrographique du SHOM. Les « trous » (zone non comprise dans les spécifications, mais entièrement entourée par la zone à couvrir) éventuels pourront être inclus dans la zone couverte. L’emprise pourra être étendue au large, au plus jusqu’à 6 milles du TdCH, de façon à couvrir certaines zones d’intérêt reconnu et en fonction des conditions environnementales.
- En terre, jusqu’à la courbe de niveau continue d’altitude 10 m (ligne « CN10 » sur la Figure 1), et au minimum jusqu’à 2 km à l’intérieur des terres à partir du Trait de Côte HistoLitt (ligne « TdCH + 2 km » ), dans la limite du territoire français augmenté d’une zone buffer de 500 m au delà des frontières. Les « trous » éventuels pourront être inclus dans la zone couverte.

Les territoires actuellement disponibles sont :
- Golfe du Morbihan
- Région PACA, partiellement (zone allant de Cassis à l’ouest de la Presqu’île de Giens, incluant TPM)
- Réunion
- Mayotte
- Iles Eparses
- Martinique
Les territoires en cours de traitement sont :
- Languedoc-Roussillon
- Finistère
- Guadeloupe
- Région PACA

Levés surfaciques de manière à avoir une description complète de la zone littorale avec une densité de points : 1 point / m² ou mieux sur les zones émergées, et 1 point / 25 m² en mer.

Les métadonnées du produit Litto3D® sont décrites au format XML suivant l’encodage défini par la norme ISO 19139.
Précisions (à 95%) du nuage de points :
- données bathymétriques :
•	précision planimétrique : 2,8 m 
•	précision altimétrique : 0,50 m
- données topographiques :
•	précision planimétrique : 0,5 m
•	précision altimétrique : 0,20 m

Les moyens de mesure des levés sont : le laser topographique aéroporté pour la partie terrestre, le laser bathymétrique aéroporté pour la partie maritime, le sondeur multifaisceaux embarqué à bord de navires pour compléter la partie maritime dans les zones inaccessibles au laser bathymétrique (eaux trop profondes ou trop turbides…).

Les données sont disponibles sous deux formes : un semis de points tridimensionnels et un modèle numérique de terrain maillé et qualifié</gco:CharacterString>
               </gmd:statement>
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                  <gmd:LI_ProcessStep>
                     <gmd:description xsi:type="lan:PT_FreeText_PropertyType">
                        <gco:CharacterString>Le référentiel Litto3D® est disponible uniquement dans la projection plane légale de la zone concernée, associée au système géodésique légal de la zone. Le tableau ci-dessous donne la liste des systèmes géodésiques légaux et des projections planes associées</gco:CharacterString>
                        <gmd:PT_FreeText>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#FR">Le référentiel Litto3D® est disponible uniquement dans la projection plane légale de la zone concernée, associée au système géodésique légal de la zone. Le tableau ci-dessous donne la liste des systèmes géodésiques légaux et des projections planes associées</gmd:LocalisedCharacterString>
                           </gmd:textGroup>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#EN">Litto3D® reference material is only available in the legal planar projection of the area concerned, in association with the area’s legal geodesic system. The table below lists the legal geodesic systems and their associated planar projections.</gmd:LocalisedCharacterString>
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                     <gmd:description xsi:type="lan:PT_FreeText_PropertyType">
                        <gco:CharacterString>Type de données : 
Reliefs
Océanographie physique
Hydrographie
Précision sur le type de donnée : 
Représentation 3D – topographie bathymétrie du littoral français

Paramètre(s) observé(s) ou mesuré(s) : 
Altitude
Profondeur des fonds marins


Résolution du (ou des) paramètre(s) : 
A terre : densité des points 1m*1m ou mieux (soit 1 point / m²). Précisions (à 95%) : planimétrie 0,5m ; altimétrie 0,2m
En mer : densité des points 5m*5m ou mieux (soit un point / 25m²). Précisions (à 95%) : planimétrie 2,8m ; altimétrie 0,5m



Fréquence d'actualisation : Non définie, fonction des partenariats

Fréquence d'observation : Non définie, fonction des partenariats</gco:CharacterString>
                        <gmd:PT_FreeText>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#FR">Type de données : 
Reliefs
Océanographie physique
Hydrographie
Précision sur le type de donnée : 
Représentation 3D – topographie bathymétrie du littoral français

Paramètre(s) observé(s) ou mesuré(s) : 
Altitude
Profondeur des fonds marins


Résolution du (ou des) paramètre(s) : 
A terre : densité des points 1m*1m ou mieux (soit 1 point / m²). Précisions (à 95%) : planimétrie 0,5m ; altimétrie 0,2m
En mer : densité des points 5m*5m ou mieux (soit un point / 25m²). Précisions (à 95%) : planimétrie 2,8m ; altimétrie 0,5m



Fréquence d'actualisation : Non définie, fonction des partenariats

Fréquence d'observation : Non définie, fonction des partenariats</gmd:LocalisedCharacterString>
                           </gmd:textGroup>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#EN">Data type : 
Relief
Physical oceanography
Hydrography
Precision on the data type :
3D Representation  –  bathymetric topography of the French coast.

Measured or observed parameters : 
Altitude
Depths of the sea floor

Parameters resolution :
On land: point density of 1m*1m or better (1 point / m²). 
Accuracy (95%) : planimetry 0.5m ; altimetry 0.2m
At sea: point desity of 5m*5m or better (1 point / 25m²). 
Accuracy (95%) : planimetry 2.8m ; altimetry 0.5m


Update frequency : Undefined : depends on partnerships 
Observation frequency : Undefined : depends on partnerships</gmd:LocalisedCharacterString>
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                        <gco:CharacterString>Plan(s) d'échantillonnage : 
Spatial</gco:CharacterString>
                        <gmd:PT_FreeText>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#FR">Plan(s) d'échantillonnage : 
Spatial</gmd:LocalisedCharacterString>
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                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#EN">Sampling method : Spatial</gmd:LocalisedCharacterString>
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                  <gmd:LI_ProcessStep>
                     <gmd:description xsi:type="lan:PT_FreeText_PropertyType">
                        <gco:CharacterString>Dispositif(s) associé(s) : Histolitt, PNH</gco:CharacterString>
                        <gmd:PT_FreeText>
                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#FR">Dispositif(s) associé(s) : Histolitt, PNH</gmd:LocalisedCharacterString>
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                           <gmd:textGroup>
                              <gmd:LocalisedCharacterString locale="#EN">device associated : Histolitt, PNH</gmd:LocalisedCharacterString>
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