Safleoedd o Ddiddordeb Gwyddonol Arennig
This spatial dataset contains the digital boundaries of Sites of Special Scientific Interest (SSSIs) in Wales. SSSIs cover a wide range of habitats from small fens, bogs and riverside meadows to sand-dunes, woodlands and vast tracts of uplands. Most are in private ownership, although some are owned and managed by local wildlife trusts, or other voluntary conservation bodies. Notification of an SSSI under the Wildlife and Countryside Act 1981 has since been amended by the Countryside and Rights of Way Act 2001, which brought about numerous changes in the way SSSI are notified managed and protected. In order to ensure consistent, favourable long-term management of these sites, Natural Resources Wales (NRW) with landowners have prepared management plans for all SSSI in Wales. Local planning authorities are required to consult NRW before allowing any development to proceed that may affect an SSSI. Water, gas and electricity companies must also do the same. SSSIs have been designated, from 1949 to the present day, and are on-going. The data has been held digitally since the mid-1990s. This data has been checked by relevant NRW staff. Please refer to the designation map as the legal definitive boundary. For large SSSIs that were captured digitally and have been printed on a smaller scale map than OS MasterMap, please refer to the OS MasterMap edition at time of capture to view the definitive boundary.
test changee....
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS98776
- Teitl Amgen
-
- Sites of Special Scientific Interest (SSSI).lyr
- Sites (SSSI)
- Laith Metadata
- English
- Datganiad
-
All SSSIs designated before GIS technology have been converted into digital data from paper maps of various scales. In 2008 the whole dataset was updated to OS MasterMap (mostly to CCW 2006 OS update). This update referred to the original designation maps and all notational descriptions on these maps e.g. “Only the water under the bridges included in the site” OR “SSSI boundary follows, in part the lines of the Mean High and Low Water Marks; both are liable to change.” All new or re-notified sites will be put to the latest release by NRW of OS MasterMap and this information is recorded in the attribute data under the Last_Edited column. As OSMM is updated by the Ordnance Survey it is important to check where boundaries may subsequently have moved.
- Gwybodaeth ychwanegol
-
Please refer to Countryside Acts 1949,1981 and 2001, for reasons for capture of original designation. NRW has also created a subset of this dataset showing only those where relate to the marine environment. These are available on the Welsh Government marine planning portal.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2025-10-08
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Maint Fertigol
- Maint allweddair MEDIN
-
water column boundary layer; benthic boundary layer; atmospheric boundary layer
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Geographic Information System
(
Unknown
)
- Math
-
ESRI Feature Class
-
Geographic Information System
(
Unknown
)
- Lleolwr Adnoddau
-
Download Data and Web Service
World Wide Web page
- Lleolwr Adnoddau
-
Web Mapping Service
World Wide Web page
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
-
All SSSIs designated before GIS technology have been converted into digital data from paper maps of various scales. In 2008 the whole dataset was updated to OS MasterMap (mostly to CCW 2006 OS update). This update referred to the original designation maps and all notational descriptions on these maps e.g. “Only the water under the bridges included in the site” OR “SSSI boundary follows, in part the lines of the Mean High and Low Water Marks; both are liable to change.” All new or re-notified sites will be put to the latest release by NRW of OS MasterMap and this information is recorded in the attribute data under the Last_Edited column. As OSMM is updated by the Ordnance Survey it is important to check where boundaries may subsequently have moved.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
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- conservation (see also conservation of specific subjects)
- geographical information systems (GIS)
- Site of Special Scientific Interest (SSSI)
- habitats (see also specific types of habitats)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-13
Allweddair
-
SeaDataNet Parameter Discovery Vocabulary
-
- Habitat characterisation
- Habitat extent
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-03-28
Allweddair
-
NRW SMNR Keywords
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- Management Areas (SMNR)
- Soil and Land (SMNR)
- Regulating Services (SMNR)
- Animals, Plants and Other Organisms (SMNR)
- Ecosystem Services (SMNR)
- Sea and Coast (SMNR)
- Provisioning Services (SMNR)
- Woodlands (SMNR)
- Cultural Services (SMNR)
- Physical Geography (Physiography) (SMNR)
- Freshwater and Wetlands (SMNR)
- Marine (SMNR)
- Sustainable Management of Natural Resources (SMNR)
- Natural Resources (Incl. Features and Processes) (SMNR)
- Mountains, Moorland and Heaths (SMNR)
- Semi-natural Grasslands (SMNR)
- Coastal Margins (SMNR)
- Ecosystem (SMNR)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-19
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
SSSI NH3 Critical Levels
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-3938373736 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2025-10-15T08:31:09.801Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0