Welsh Lakes Bathymetry Data

Bathymetric data from Welsh lakes collated from documentary and electronic sources and re-formatted into a consistent and accessible form and structure. The data includes transformed raw coordinate and depth data to bathymetric surface rasters at 0.5 m interval polygon shapefiles that can be placed into GIS software with volume/depth and area/depth data for the lakes at the same 0.5 m interval. The data supplied collates existing bathymetric data to produce a series of GIS layers that display detailed bathymetric maps of all the Welsh lakes.

Identifier: NRW_DS102203

Alternative Title

Welsh lakes bathymetry.LYR
Standardised Bathymetric Data Generation and Statistical Analysis of Welsh Lakes
Data Bathymetrig o Lynnoedd Cymru Cynhyrchu Data Bathymetrig Safonedig Dadansoddiad Ystadegol o Lynnoedd Cymru

Metadata Language: cym

Metadata Language: English

Lineage: Data was collated from sources from 1902 onwards. Standardisation and statistical analysis was undertaken in 2010. Depth measurements obtained using hand held echo sounder and boat mounted systems, geographic locations obtained from original contour lake maps, approximate geographical locations and handheld GPS units to obtain accurate grid references. The confidence in this dataset is high as data collated and analysed by experienced environmental professionals however for many of the lakes the raw data may be imperfect and should be treated with caution. In some cases no bathymetric information is available (e.g. Llyn Bodlyn, Llyn Ogwen, Llyn Hesgin, Llyn Bodlyn, Llyn Du) and this information is availale as spot data only.

Additional Information: INFORMATION WARNING: This data should not be used for navigation purposes.

Dataset Reference Date (Publication): 2019-10-18

Temporal Extent

Begin date: 1902-01-01

End date: 2019-10-18

Topic category

Inland waters

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

Ensis Ltd

UCL (University College London) Pearson Building, Gower Street, London, WC1E 6BT, England

http://www.ensis.ucl.ac.uk/

Extent

Geographic Extent: Wales (WLS)

Format Type and Description

Geographic Information System ()

Specification

[A] The final report in Microsoft Word and Adobe PDF formats. [B] A series of GIS layers in ArcGis format (shp file). The archive consists of a folder for each lake containing the individual depth layers, plus a layer for all depth data [C] A series of GIS layers in MapInfo format (tab file) created by CCW. The archive consists of a folder for each lake containing the layer with all depth data, an outline of the lake and the transect points (xyz) at which data was collected. A single amalgamated layer for all lakes is also provided [D] A set of PDF files of the depth maps and depth-volume and hypsographic curves

Data quality

Quality Scope: Dataset

Conformity: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation
Degree: false

Lineage: Data was collated from sources from 1902 onwards. Standardisation and statistical analysis was undertaken in 2010. Depth measurements obtained using hand held echo sounder and boat mounted systems, geographic locations obtained from original contour lake maps, approximate geographical locations and handheld GPS units to obtain accurate grid references. The confidence in this dataset is high as data collated and analysed by experienced environmental professionals however for many of the lakes the raw data may be imperfect and should be treated with caution. In some cases no bathymetric information is available (e.g. Llyn Bodlyn, Llyn Ogwen, Llyn Hesgin, Llyn Bodlyn, Llyn Du) and this information is availale as spot data only.

Keywords

GEMET - INSPIRE themes, version 1.0

Hydrography

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

bathymetry
Bathymetric survey
Lakes (Limnology)
lake classification

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: There are no access restrictions to this data. NRW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © CCGC/CCW 2012 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.

Metadata

File Identifier: 4f4c4942-4343-5764-6473-313032323033 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-30T15:37:27.683Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

Access the portal

Full access to the portal and metadata.

Welsh Lakes Bathymetry Data

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body