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 Welsh lakes.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
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
- 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.
INFORMATION WARNING: This data should not be used for navigation purposes.
- Dataset Reference Date (Publication)
- 2024-04-02
Temporal Extent
- Begin date
- 1902-01-01
- End date
- 2019-10-18
- Topic category
-
- Inland waters
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
Distribution
- Format Type and Description
-
-
Geographic Information System
(
Unknown
)
- 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
-
Geographic Information System
(
Unknown
)
- Resource Locator
- Download Data & Web Services ( WWW:LINK-1.0-http--link )
- Resource Locator
- Web Mapping Service ( OGC:WMS )
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
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- 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.
INFORMATION WARNING: This data should not be used for navigation purposes.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- lake classification
- Lakes (Limnology)
- bathymetry
- Bathymetric survey
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
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
-
© 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.
Attribution Statement
- Other constraints
-
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
Licence
- Other constraints
- Open Government Licence
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313032323033 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2025-02-04T10:10:40.178Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0