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.

Identification

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
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

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

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

 

Quality

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

Keywords

GEMET - INSPIRE themes, version 1.0
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
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

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

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

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