Alternate title

GB000012

Date (Creation)

2019-02-01

Citation identifier

0ba7adff-0afb-4e6d-86c0-207a269d81e2

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Channel Coast Observatory		cco@channelcoast.org	Owner

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features
• Habitats and biotopes

GEMET - Concepts, version 4.1.3

• habitat
• biotope

Access constraints

Other restrictions

Other constraints

no limitations to public access

Use constraints

Other restrictions

Other constraints

Open Government Licence v3.0

Spatial representation type

Vector

Denominator

1500000

Language

English

Topic category

• Biota
• Oceans

Begin date

2019-02-01

End date

2019-02-01

Reference system identifier

http://www.opengis.net/def/crs/EPSG/0/3857

Distribution format

Name	Version
ESRI Shapefile	1
GML	3.2.1

OnLine resource

Protocol	Linkage	Name
OGC:WMS	https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_view_maplibrary/wms	gb000012
OGC:WFS	https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_open_maplibrary/wfs	gb000012
WWW:LINK-1.0-http--link	https://files.emodnet-seabedhabitats.eu/data/EMODnetSBHsurvey_GB000013.zip	EMODnet Seabed Habitats Static Download

Hierarchy level

Dataset

Statement

A suite of aerial photography (AP) was made available to the project to facilitate habitat mapping by aerial photograph interpretation (API). The aerial imagery consisted of red/green/blue (RGB) and near infra-red (NIR) photography captured in 2017/18, supplied in Enhanced Compression Wavelet (ECW) format at 0.1 m pixel size, and delivered as individual 10*10 km tiles, following the Ordnance Survey (OS) reference grids. Each ECW RGB and NIR tile were converted from their original data format to GeoTiff. Polygons for the 2017/18 habitat map were produced by automated image segmentation. The AP, OS OpenData and manually digitised urban areas were imported into Trimble eCognition software, and processed via a multi-resolution segmentation algorithm. The segmentation process analyses each pixel location for each specified data layer, and groups pixels of similar characteristics together to form objects, following spatial changes in land cover type. IHS habitat attribution was carried out through manual API within QGIS software. Quality assurance (QA) comprised a manual assessment of polygon attribution using the same reference material available during the API phase. The accuracy of polygon shape and transitions between habitats was also checked at this stage. Completed 10 km OS grids were submitted to the Plymouth Coastal Observatory (PCO) for review, allowing a correctional period to incorporate feedback into the final dataset, before the minimum mapping unit (MMU) was applied. The MMU describes the minimum size for features to be included into their respective habitats. The MMU process was carried out such that polygons falling below the minimum area thresholds were merged into the neighbouring polygons with which it shared the longest common boundary. The MMU process was carried out using Feature Manipulation Engine (FME) software. This map was then formatted by JNCC to meet the Data Exchange Format v4.1 required for EMODnet uploads in September 2023.

Metadata

File identifier

0ba7adff-0afb-4e6d-86c0-207a269d81e2 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Date stamp

2023-10-27T13:32:12.041Z

Metadata author

Organisation name	Individual name	Electronic mail address	Role
JNCC		emodnetseabedhabitats@jncc.gov.uk	Point of contact