4f4c4942-4343-5764-6473-313032323033 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-12-01T16:39:45.629Z NRW 1.0 wel British National Grid (EPSG::27700) Welsh Lakes Bathymetry Data Welsh Lakes Bathymetry Data Data Bathymetreg Llynnoedd Cymru 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 2024-04-02 NRW_DS102203 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 Welsh lakes. 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 Welsh lakes. Data bathymetrig o lynnoedd Cymru wedi'i goladu o ffynonellau dogfennol ac electronig a'i ail-fformatio i ffurf a strwythur cyson a hygyrch. Mae'r data'n cynnwys data cyfesurynnau a dyfnder crai wedi'i drawsnewid i rastrau arwyneb bathymetrig ar ffurf ffeiliau siâp polygon â chyfwng o 0.5m y gellir eu gosod mewn meddalwedd GIS gyda data cyfaint/dyfnder ac arwynebedd/dyfnder ar gyfer y llynnoedd ar yr un cyfwng o 0.5m. Mae'r data a gyflenwir yn coladu data bathymetrig presennol i gynhyrchu haenau GIS sy'n dangos mapiau bathymetrig manwl o holl lynnoedd Cymru. Casglwyd data o ffynonellau o 1902 ymlaen. Cynhaliwyd gwaith safoni a dadansoddi ystadegol yn 2010. Cafwyd y mesuriadau dyfnder gan ddefnyddio seinydd adlais llaw a systemau ar gychod; cafwyd y lleoliadau daearyddol o fapiau cyfuchliniau llynnoedd gwreiddiol, lleoliadau daearyddol bras ac unedau GPS llaw i gael cyfeirnodau grid cywir. Mae’r hyder yn y set ddata hon yn uchel gan i’r data gael ei goladu a’i ddadansoddi gan weithwyr proffesiynol amgylcheddol profiadol; fodd bynnag, ar gyfer llawer o’r llynnoedd gall y data crai fod yn amherffaith a dylid bod yn ofalus. Mewn rhai achosion nid oes gwybodaeth bathymetrig ar gael (e.e., Llyn Bodlyn, Llyn Ogwen, Llyn Hesgin, Llyn Du) ac mae'r wybodaeth hon ar gael fel data ar gyfer mannau penodol yn unig. Datganiad priodoli Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Centre for Ecology & Hydrology © UKRI (CEH). © ENSIS-ECRC, University College London Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Ensis Ltd UCL (University College London) Pearson Building, Gower Street, London, WC1E 6BT, England s.patrick@geog.ucl.ac.uk http://www.ensis.ucl.ac.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Hydrography GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme bathymetry Lakes (Limnology) lake classification Bathymetric survey NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Centre for Ecology & Hydrology © UKRI (CEH). © ENSIS-ECRC, University College London. Open Government Licence wel inlandWaters SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 1902-01-01 2019-10-18 Geographic Information System Unknown [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 https://datamap.gov.wales/layergroups/geonode:nrw_wales_lakes_bathy WWW:LINK-1.0-http--link Download Data & Web Services https://datamap.gov.wales/capabilities/layergroup/6562/?ows_service=wms OGC:WMS Web Mapping Service 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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 available as spot data only. INFORMATION WARNING: This data should not be used for navigation purposes. 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 available as spot data only. INFORMATION WARNING: This data should not be used for navigation purposes. Casglwyd data o ffynonellau o 1902 ymlaen. Cynhaliwyd gwaith safoni a dadansoddi ystadegol yn 2010. Cafwyd y mesuriadau dyfnder gan ddefnyddio seinydd adlais llaw a systemau ar gychod; cafwyd y lleoliadau daearyddol o fapiau cyfuchliniau llynnoedd gwreiddiol, lleoliadau daearyddol bras ac unedau GPS llaw i gael cyfeirnodau grid cywir. Mae’r hyder yn y set ddata hon yn uchel gan i’r data gael ei goladu a’i ddadansoddi gan weithwyr proffesiynol amgylcheddol profiadol; fodd bynnag, ar gyfer llawer o’r llynnoedd gall y data crai fod yn amherffaith a dylid bod yn ofalus. Mewn rhai achosion nid oes gwybodaeth bathymetrig ar gael (e.e., Llyn Bodlyn, Llyn Ogwen, Llyn Hesgin, Llyn Du) ac mae'r wybodaeth hon ar gael fel data ar gyfer mannau penodol yn unig.