Coastal topo-bathymetric DEM for the coasts of the Passion Island and Clipperton

The coastal topo-bathymetric DEM was produced using the bathymetric and topographic data acquired between 2012 and 2015 by Shom and the PASSION programme team. The 20 m coastal grid covers the Passion atoll – Clipperton and the local flanks of the atoll to a depth of 1500 m.

Passion island - Clipperton, in the eastern Pacific Ocean, is a remote uninhabited atoll over 5,000 km from Tahiti in French Polynesia and over 1,000 km from the Mexican coasts. Passion island is the highest point on the Clipperton ridge, and the only location above water level. This is the only coral atoll in the eastern Pacific in the northern hemisphere, at a longitude of W 109° and a latitude of N 10°.

Citation proposal
. Coastal topo-bathymetric DEM for the coasts of the Passion Island and Clipperton. https://services.data.shom.fr:/geonetwork/srv/api/records/MNT_COTIER_PASSION_CLIPPERTON_20m_WGS84.xml

Simple

Date ( Creation ): 2017-02-09T00:00:00

Identifier: http://www.shom.fr/BATHYMETRIE/MNT_COTIER_PASSION_CLIPPERTON_20m_WGS84

Presentation form: Digital map

Credit: ©Shom

Status: On going

Owner

Shom

13 rue du Chatellier

Brest

29200

France

Maintenance and update frequency: Not planned

GEMET - INSPIRE themes, version 1.0 ( Theme )

Elevation

Keywords ( Theme )

topography
bathymetry
digital elevation model
Product
open data

Keywords ( Place )

Pacific Ocean
Clipperton

Keywords ( Discipline )

Geophysic

High-value dataset categories

Observation de la terre et environnement

Use limitation: Data may be freely used providing that the source is mentioned as follows ""Shom,2017. MNT topo-bathymétrique côtier à 20m de l'Île de La Passion - Clipperton. http://dx.doi.org/10.17183/MNT_COTIER_PASSION_CLIPPERTON_20m_WGS84"

Use limitation: Data may not be modified or distributed without the agreement of the distributor.

Use limitation: Do not use for navigation

Use limitation: The product is distributed under an Opendata license (version 2.0, April 2017), defined by the Etalab mission.

Use limitation: Data may not be modified or distributed without the agreement of the distributor.

Access constraints: Other restrictions

Use constraints: License

Other constraints: Data may be freely used providing that the source is mentioned as follows ""Shom,2017. MNT topo-bathymétrique côtier à 20m de l'Île de La Passion - Clipperton. http://dx.doi.org/10.17183/MNT_COTIER_PASSION_CLIPPERTON_20m_WGS84"

Access constraints: Other restrictions

Other constraints: Pas de restriction d'accès public. No public access restrictions.

Classification: Unclassified

Spatial representation type: Grid

Distance: 0.0002 dd

Metadata language: fre French

Character set: utf8 UTF8

Topic category

Elevation

Vertical extent

Minimum value: -2181.3

Maximum value: 24.65

Vertical CS

No information provided.

Vertical datum

No information provided.

Reference system identifier

EPSG

WGS 84 (EPSG:4326)

7.9

Number of dimensions: 2

Dimension name: Row

Dimension size: 1092

Resolution: 0.0002 dd

Dimension name: Column

Dimension size: 1028

Resolution: 0.0002 dd

Cell geometry: Area

Transformation parameter availability: false

Distribution format

ArcGis Grid
(
-
)
BAG
(
-
)
GLZ
(
-
)
GRD
(
-
)

Distributor

Shom

OnLine resource: Shom geoportal

OnLine resource

MNT_COTIER_CLIPPERTON_3857_WMSR

Coastal topo-bathymetric DEM Passion island - Clipperton raster WMS

OnLine resource: Download service LAT

OnLine resource: Download service LAT part 2

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2010-11-23

Explanation: Information sur la conformité au règlement d'interopérabilité des séries et des services de données géographiques.

Pass: true

Conformance result

Date ( Publication ): 2013-12-10

Explanation: Information sur la conformité de la ressource à une spécification (INSPIRE).

Pass: true

Statement: In addition to the Shom data, the surveys of external organisms have been exploited, the contributors of which are as follows: PASSION 2015 scientific team.

Description

The main tasks involved in producing this range of solutions are based on 4 key aspects, each intended to reduce uncertainty for the DEM:

1) collecting, evaluating, pre-processing and selecting data from multiple sources after acquisition using survey systems from various eras;

2) homogenising the vertical and horizontal datums for data sets;

3) using interpolation algorithms suitable for a heterogeneous distribution and the variable density of data, and

4) evaluating and qualifying the final product and preparing documentation.