Straight baselines

In the Law of the Sea, a straight baseline is composed by a loxodrome connecting two points of the low-water line or low-tide elevations if there is a lighthouse or similar permanent infrastructure on them. The conditions to draw such lines are defined in Article 7 of UNCLOS.

The straight baselines are part of the baselines of a coastal State below which the internal waters are defined. Those straight baselines, in addition with the normal baseline, compose the inner limit of the territorial sea and are the basis of the computations of the outer limits of other maritime spaces defined by UNCLOS. They are also composed of the closure line for bays and rivers in compliance with Aricles 9 and 10 of UNCLOS.

The objects of the theme "Straight baselines" result from Shom computations and are published by decree of the French Republic.

Citation proposal
Shom. Straight baselines. https://services.data.shom.fr:/geonetwork/WS/api/records/BDML_LIMIT_JURIFR_LBD.xml

Simple

Date ( Revision ): 2022-11-03

Identifier: http://www.shom.fr/BDML/LIMIT_JURIFR/LBD

Author

Shom

13 rue du Chatellier

BREST

29200

France

Keywords

regulation
law of the sea
Baseline
Straight baseline
open data

GEMET - INSPIRE themes, version 1.0 ( Theme )

Administrative units

INSPIRE Spatial scope

Nationales

Use limitation: Data free of use by acknowledging its source. Open licence Etalab v. 2.0 avril 2017.

Use limitation: Product not certified for navigation

Use limitation: Data free of use by acknowledging its source. Open licence Etalab v. 2.0 avril 2017.

Access constraints: License

Use constraints: Other restrictions

Other constraints: Open licence Etalab v. 2.0 avril 2017.

Access constraints: Other restrictions

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

Classification: Unclassified

Spatial representation type: Vector

Metadata language: fre French

Character set: utf8 UTF8

Topic category

Boundaries

Distribution format

SHP
(
inapplicable
)
GML
(
3.2
)
7z
(
9.20
)

Point of contact

Shom

OnLine resource

French national portal of maritime limits

OnLine resource: DELMAR_BDD_WMSV
Access point / WMS vector

OnLine resource: DELMAR_PYR-PNG_WLD_3857_WMSR
Access point / WMS raster

OnLine resource: Download service

OnLine resource: DELMAR_BDD_WFS:au_baseline
Access point Straight baselines

OnLine resource

Shom geoportal

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2014-04-17

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

Pass: true

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

Statement: The theme "Straight baselines" is based on the basepoints defined by decree. When the geographical coordinates of the points are expressed in the legal reference in a geodetic system other than WGS84, they are converted into WGS84 with parameters and conversion formulae the most accurate Shom has.