Title

Litto3D®

Date (Creation)

2005-01-01T00:00:00

Citation identifier

FR-DCSMM-PDS-BD_LITTO3D

Presentation form

Digital profile

Abstract

The Litto3D® project, along with the IGN, is responsible for producing detailed topographical and bathymetric information in mainland France so as to meet the needs of coastal and land-based stakeholders.

Purpose

The aim of the national Litto3D® programme is to produce a benchmark digital altimetric model to be used both on land and at sea along the coastal fringe. This involves conducting studies of the terrain of the sea floor and measuring marine depths in order to have accurate knowledge about all French mainland and overseas (Guadeloupe, Martinique, Reunion Island, French Guyana, Mayotte and Saint-Pierre-and-Miquelon) maritime areas.

The coastal fringe includes:

- At sea : up to the bathymetric contour at a continuous depth of 10m and at a maximum of 6 nautical miles from the coast.

- On land: up to an altitude of +10m, and at least 2 km inland.

In total, the scope of the programme covers around 45000 km².

Credit

Data producers : IGN, SHOM

Status

On going

Point of contact

Organisation name	Individual name	Electronic mail address	Role
SHOM	LAMARRE Vincent	vincent.lamarre@shom.fr	Local service desk
IGN	DUPERET Alain	alain.duperet@ign.fr	Local service desk

Maintenance and update frequency

Not planned

Maintenance note

Network Duration : perennial Network

Theme

• Topo-bathymetric product

• Bathymetry

• Topography

• Altimetry

• Coast

• Terrain

• Depth

• Land

• Sea

• Seamless

• Land-sea continuity

• Digital model

• Scatter diagram

• Airborne Lidar

• Airborne Laser

• Multibeam surveying

GEMET - INSPIRE themes, version 1.0

• Environmental monitoring facilities

Sous-regions marines

• National

DCSMM : Type d'espace concerné

• Pas d'espace particulier concerné

DCSMM : Descripteurs

• D7: Hydrographical Conditions

DCSMM : Méthodes de recueil des données

• Télédétection

Thèmes Sextant

• /Physical Environment/Bathymetry/Digital Terrain Model

Access constraints

License

Other legal constraints

Free access

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.

Use limitation

The Litto3D® product is subject to restrictions on certain controlled areas. As such, no data will be provided in these areas.

Spatial representation type

Vector

Denominator

50000

Language

Français

Character set

UTF8

Topic category

• Oceans

Supplemental Information

Project leader :

Etat 2005

IGN 2005

SHOM 2005

Communauté d’agglomérations TPM 2007

EPA – EPIC partenaires 2009

Collectivités territoriales (Régions, Départements) 2009

Prime contractor :

SHOM / IGN 2005

Backers :

Etat 2005

IGN 2005

SHOM 2005

Communauté d’agglomérations 2007

EPA – EPIC partenaires 2009

Collectivités territoriales (Régions, Départements) 2009

Europe (FEDER) 2010

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 7.9

Topology level

Geometry only

Geometric object type

Complex

Geometric object count

0

OnLine resource

Protocol	Linkage	Name
WWW:LINK	http://www.shom.fr/fileadmin/data/DOPS/MIP/PEP/BATHY/Litto3D/Doc_technique/Specifications-techniques-Litto3D_v1.4.pdf	Spécifications techniques

Hierarchy level

Dataset

Statement

2005 : 1st Litto3D SHOM demonstration in the Golfe du Morbihan

2007 : 1st Litto3D IGN-SHOM demonstration in Toulon-Provence- Méditerranée (TPM)

2009 – 2012 : Start of production (Indian Ocean and Mainland France)

The Litto3D® database extends along the coastal fringe in the areas concerned according to the following criteria:

- at sea up to the bathymetric contour at a continuous depth of 10m (the “CB10 line”) including only the SHOM’s area for hydrographical responsibility. Any “holes” (areas which are not included in the specifications, but which are completely surrounded by the area to be covered) could also be included in coverage areas. The scope of the project could be extended out to sea, up to 6 nautical miles from the TdCH coastal limit, in order to include certain areas of particular interest, according to environmental conditions.

- On land, up to a continuous altitude contour of 10m (the “CN10” line in Figure 1), and at least 2km inland from the TdCH coastal limit (known as the (“TdCH + 2 km” line), within the limits of French territories including a buffer zone of 500m beyond French borders. Any “holes” could also be included in coverage areas.

The areas currently available are as follows:

- Golfe du Morbihan

- PACA region, partially (area from Cassis to the west of the Presqu’île de Giens, including TPM)

- Réunion

- Mayotte

- Iles Eparses

- Martinique

-

Areas currently being processed :

- Languedoc-Roussillon

- Finistère

- Guadeloupe

- PACA region

Surface surveying in order to obtain a comprehensive description of the coastal area with a point density of 1 point/m² or more for emerged areas, and 1 point/25m² at sea.

Litto3D® metadata is in XML format in accordance with encoding requirements determined by ISO 19139

Precision ( 95%) of the scatter cloud:

- Bathymetric data:

• Planimetric accuracy: 2.8 m

• Altimetric accuracy: 0.50 m

- Topographical data:

• Planimetric accuracy: 0.5 m

• Altimetric accuracy: 0.20 m

Survey measurement methods are as follows: aerial topographical laser for the land elements, aerial bathymetric laser for the maritime elements, and multibeam echosounder on board vessels to complete the maritime elements in areas which are inaccessible for the bathymetric laser (waters too deep or too rough).

Data is available in two formats: a three-dimensional scatter diagram and a meshed and validated digital terrain model.

Description

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.

Description

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

Description

Sampling method : Spatial

Description

device associated : Histolitt, PNH

Metadata

File identifier

4c54ac5e-9b83-42ad-b10e-e0769d6a1cd3

Metadata language

Français

Other language

Language	Character encoding
English

Character set

UTF8

Hierarchy level

Series

Date stamp

2020-06-04T00:46:01

Metadata standard name

ISO 19115:2003/19139 - SEXTANT

Metadata standard version

1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Sextant		sextant@ifremer.fr	Local service desk