BY_Mallet_CelticSea_14m_WGS84

Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Mallet 2019-2020 Legs Celtic Sea Cork 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2019-07-17 and 2020-10-31 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (INFOMAR, Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"

Alternate title: KN172L08 SeaBeam 3012-P1 Bathymetry Grid

Date (Creation): 2021-12-13T00:00:00

Date (Revision): 2021-12-13T00:00:00

Citation identifier: BY_Mallet_CelticSea_14m_WGS84

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Geological Survey Ireland		GSI-Seabed@gsi.ie	Originator
Geological Survey Ireland		GSI-Seabed@gsi.ie	Custodian

Project name

EMODNet Bathymetry

SeaDataNet device categories

multi-beam echosounders
multi-beam echosounders

SeaDataNet device categories

multi-beam echosounders
Differential Global Positioning System receivers

Parameter Discovery Vocabulary (P02)

Bathymetry and Elevation

GEMET - INSPIRE themes, version 1.0

Hydrography

Access constraints: Creative Commons Attribution 4.0 International

Use constraints: Other restrictions

Other constraints: DO NOT USE FOR NAVIGATION

Denominator: 100000

Distance: 0.000130208334 degree

Language: English

Character set: UTF8

Topic category

Oceans

Begin date: 2018-07-17T09:00:00

End date: 2020-09-15T09:00:00

Geographic identifier: http://vocab.nerc.ac.uk/collection/C19/current/1_6/

Description: Map projection parameters, values and units :

Axes units :

UPPER LEFT X=29.3054583250

UPPER LEFT Y=44.6262830219

LOWER RIGHT X=40.7816282263

LOWER RIGHT Y=41.2281769950

WEST LONGITUDE=29° 18' 19.6500" E

NORTH LATITUDE=44° 37' 34.6189" N

EAST LONGITUDE=40° 46' 53.8616" E

SOUTH LATITUDE=41° 13' 41.4372" N

PROJ_DESC=Geographic (Latitude/Longitude) / WGS84 / arc degrees

PROJ_DATUM=WGS84

PROJ_UNITS=arc degrees

EPSG_CODE=4326

COVERED AREA=353215 sq km

Geographic identifier: EPSG / WGS84 / Geographic coordinate system / 7.4

Unique resource identifier: EPSG:84

Reference system identifier: EPSG / WGS 84 (EPSG:4326) / 7.4

Number of dimensions: 3

Dimension name: Column

Dimension size: 17765

Dimension name: Row

Dimension size: 0

Dimension name: Time

Dimension size: 1

Resolution: 1 minute

Cell geometry: Point

Transformation parameter availability: No

Checkpoint Availability: No

Point in Pixel

Center

Distribution format

Name	Version
NetCDF	4

Transfer size: 3810

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/high_resolution/366_BY_Mallet_CelticSea_14m_WGS84.emo.zip

Hierarchy level: Dataset

Vertical extent

Minimum value: 72.66

Maximum value: 122.58

Vertical CS

Vertical datum

Statement: no information

Hierarchy level: Feature

Dataset: accuracy

Gridded data positional accuracy

Name of measure: horizontal accuracy

Measure identification: horizontal accuracy of coordinate

Quantitative result

Value type: horizontal accuracy

Quantitative attribute accuracy

Name of measure: depth

Measure identification: depth accuracy

Quantitative result

Value: not defined

Conformance result

Title: Shoal bias

Date

Explanation: No shoals detected

Pass: Yes

Hierarchy level: Software

Description: MB-System

Other: software

Hierarchy level: Property type

Description: parameters of data processing

Attributes

No information provided.

Statement: EMODnet processing methodology using Globe software

Description: MAL18_02_CelticSeaCorkWaterford_14m_WGS84

MAL19_01_CelticSeaCork_14m_WGS84

MAL19_02_CelticSea_14m_WGS84

MAL19_03_CelticSeaCork_14m_WGS84

MAL19_04_CelticSeaCork_14m_WGS84

MAL19_05_CelticSea_14m_WGS84

Hierarchy level: Dataset

Absolute external positional accuracy

Name of measure: emodnet-bathymetry.QI.Horizontal

Value: -1 - Multisources

Absolute external positional accuracy

Name of measure: emodnet-bathymetry.QI.Vertical

Value: -1 - Multisources

Domain consistency

Name of measure: emodnet-bathymetry.QI.Purpose

Value: 3 - Hydrographic survey or compatible with hydrographic standards

Metadata

File identifier: SDN_CPRD_366_BY_Mallet_CelticSea_14m_WGS84 XML

Metadata language: English

Character set: UTF8

Hierarchy level name: Composite Product Record

Date stamp: 2023-01-26T15:08:03.962Z

Metadata standard name: ISO 19115:2003/19139 - EMODNET - BATHYMETRY

Metadata standard version: 1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Geological Survey Ireland		GSI-Seabed@gsi.ie	Author

Overviews

BY_Mallet_CelticSea_14m_WGS84.JPG

Spatial extent

Provided by

Access to the catalogue

Read here the full details and access to the data.

Simple

Vertical extent

Vertical CS

Vertical datum

Gridded data positional accuracy

Quantitative result

Quantitative attribute accuracy

Quantitative result

Conformance result

Attributes

Absolute external positional accuracy

Absolute external positional accuracy

Domain consistency

Metadata

Overviews

Spatial extent

Keywords

Provided by