EMODnet Bathymetry - Quality index version 2020

EMODnet bathymetry is composed of a multitude of datasets from a multitude of data providers. Users of the resulting grid and associated datasets need to be able to evaluate at the grid node level the quality of the bathymetric data and product they will be using.

For this EMODnet Bathymetry has introduced a Quality index (QI). The QI is available as a WFS service providing vector data and as WMS providing the QI as an image service.

The aim of the quality index is to:

• help data users to evaluate quickly the dataset they are about to request,

• indicate to the EMODnet Basin coordinators what are the limitations of the dataset they are about to merge while building the EMODnet DTM and to

• be used as the basis of the evaluation of the quality of the EMODnet DTM.

Service URL:

https://ows.emodnet-bathymetry.eu/wfs

Date (Publication): 2021-01-15

Citation identifier: EMOdnet_BAthy_QI

Point of contact

Organisation name	Individual name	Electronic mail address	Role
EMODnet Bathymetry consortium		sextant@ifremer.fr	Point of contact

Access constraints: Creative Commons Attribution 4.0 International

Use constraints: Other restrictions

Other constraints: DO NOT USE FOR NAVIGATION

Spatial representation type: Vector

Language: English

Character set: UTF8

Topic category

Oceans

Distribution format

Name	Version

OnLine resource

Protocol	Linkage	Name
WWW:LINK	https://tiles.emodnet-bathymetry.eu/	EMODnet Bathymetry WMTS service
WWW:LINK	https://emodnet.ec.europa.eu/geoviewer	EMODnet viewer
WWW:DOWNLOAD	https://downloads.emodnet-bathymetry.eu/v10/EMODnet_Bathymetry_2020_quality_index.zip	EMODnet_Bathymetry_2020_quality_index

OnLine resource

Protocol	Linkage	Name
OGC:WFS	https://ows.emodnet-bathymetry.eu/wfs	emodnet:quality_index
OGC:WMS	https://ows.emodnet-bathymetry.eu/ows	emodnet:quality_index

Hierarchy level: Dataset

Conformance result

Title: RÈGLEMENT (UE) N o 1089/2010 DE LA COMMISSION du 23 novembre 2010 portant modalités d'application de la directive 2007/2/CE du Parlement européen et du Conseil en ce qui concerne l'interopérabilité des séries et des services de données géographiques

Date (Publication): 2010-12-08

Explanation: See the referenced specification

Statement: The EMODnet Quality indicator is an integral part of the matadata associated with each individual data set that contributed to the EMODnet DTM and comprises of the following sub indicators (possible values are indicated:

QI_Horizontal

0: Unknown or > 500m (That is grossly equivalent to TACAN, OMEGA systems or similar)

1: between 500m and 50m (That is grossly equivalent to LORAN, DECCA systems or similar)

2: between 50m and 20m (That is grossly equivalent to natural GPS systems)

3: < 20m (GPS with correction) (That is grossly equivalent to aided GPS system DGPS, RTK …)

QI_Vertical

0: Unknown, plummet, leadline

1: SBES Low Frequency, SDB (similar than 2+5%d)

2: MBES low frequency (lower than 100kHz) (similar than 1+2%d)

3: Lidar, SBES High Frequency

4: MBES High frequency (higher that 100kHz) (1+0.5%d)

QI_Age

0: 30y – oldest date (geological structural, tidal basin changes,)

1: 10y – 30y

2: 5y – 10y (erosion/deposition at the scale of structure like continental shelf / canyons…)

3: 0y – 5y (time frame of dune migration or coastal shoreface modifications)

QI_Purpose

0: Purpose of the survey unknown (historical survey with no associated information)

1: Transit and/or opportunity

2: Bathymetric/morphologic survey

3: Hydrographic survey or compatible with hydrographic standards

QI_Combined

A statistical result of the above mentioned sub indicators