To be added
This data is from the 2024 Llyn Horse Mussel (Modiolus modiolus) Multibeam Echosounder Survey (MBES).
The work was carried out by Binnies/Hydrofix funded by Nature Networks as part of an investigation into the decline observed at the reef. Both reefs were mapped to International Hydrographic order (IHO) 1a or higher.
The data was processed and analysed to produce bathymetric surfaces; backscatter mosaics; a seabed classification, including the extents of the mussel beds; and measurements of the mussel bioherms. The results from the 2024 survey were then compared to previous datasets, provided by NRW, from 2005, 2008 and 2015, all of which were analysed and reprocessed.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS161323
- Teitl Amgen
-
- Pen Llŷn A’r Sarnau SAC Horse Mussel (Modiolus modiolus) Multibeam Echosounder Survey (MBES) data 2024
- Laith Metadata
- English
- Datganiad
-
The data collected represents the highest quality data so far made available over the survey areas, with higher data density and thus better resolution than previously achieved.
Post processing of all navigation data has ensured the highest levels of positional accuracy, with cm scale accuracies achieved, while the resulting data far exceeds the IHO 1a survey specifications prescribed.
- Gwybodaeth ychwanegol
-
Willcock, J. (2024). Pen Llŷn A’r Sarnau SAC Horse Mussel (Modiolus modiolus) reef MBES survey report (2024) and time series analysis (2005-2024). NRW Evidence Report No: 851, 67pp, Natural Resources Wales
- Dyddiad cyfeirnod y set ddata (Creu)
- 2024-12-17
Ystod amser
- Dyddiad cychwyn
- 2024-06-12
- Dyddiad gorffen
- 2024-07-02
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Maint Fertigol
Maint Fertigol
- Gwerth lleiaf
- -25
- Gwerth uchaf
- -30
- System Gyfeirio Cydlynu Fertigol
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Geographic Information System
(
Unknown
)
-
Geographic Information System
(
Unknown
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- 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
- Eglurhad
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
The data collected represents the highest quality data so far made available over the survey areas, with higher data density and thus better resolution than previously achieved.
Post processing of all navigation data has ensured the highest levels of positional accuracy, with cm scale accuracies achieved, while the resulting data far exceeds the IHO 1a survey specifications prescribed.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- modiolus modiolus
- biogenic reef
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- horse mussel
- Pen Llyn a'r Sarnau SAC
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-19
Allweddair
-
SeaDataNet Parameter Discovery Vocabulary
-
- Habitat characterisation
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-19
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
Access restrictions on this data have not been determined. It may contain sensitive information and therefore may be restricted under legislation. NRW may provide access to this dataset on request, however NRW may not release, publish or disseminate the data or derived products freely without further assessment.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW. Data may only be re-used externally under provision and in line with the terms of a NRW licence following an assessment of the data.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.