Phase 2 Lowland Heathland Inventory
Arolwg Rhostir yr Iseldir Cymru Cam 2

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This is a GIS dataset consisting of a inventory of the phase 2 lowland Heathland inventory.


National Vegetation Classification (NVC) is the basis used for the selection of Sites of Special Scientific Interest (SSSI) and is used to define Annex 1 habitats for the selection of Special Areas of Conservation (SAC) under the Habitats Directive (EU Directive 92/43). This project comprises of detailed data related to the Phase 2 plant community survey for Lowland Heath across Wales. The project covers dry and maritime heath covered by the heathland section of the NVC and wet heath covered by the section of the NVC. Two non-NVC communities the calcareous grass and heath, and shingle heath are also described. This project had three main purposes: - To provide an overview of the Welsh lowland heathland resource allowing local conservation programs particularly local Biodiversity Action Plans (BAP) partnerships, to assess and interpret their resource in a Welsh context. - To identify heathland types which are underrepresented in the SSSIs series. - To identified gaps in knowledge and highlight areas for further study.

Y Dosbarthiad Llystyfiant Cenedlaethol (NVC) yw’r sail ar gyfer dewis Safleoedd o Ddiddordeb Gwyddonol Arbennig (SoDdGAau) ac fe’i defnyddir i ddiffinio cynefinoedd Atodiad 1 ar gyfer dewis Ardaloedd Cadwraeth Arbennig (ACAau) o dan y Gyfarwyddeb Cynefinoedd (Cyfarwyddeb yr UE 92/43). Mae’r prosiect hwn yn cynnwys data manwl yn ymwneud ag arolwg Cam 2 o gymunedau planhigion ar gyfer Rhostir yr Iseldir ar draws Cymru. Mae’r prosiect yn cwmpasu rhostir sych a morol sy’n dod o dan adran rhostir yr NVC, ynghyd â rhostir gwlyb sy’n dod o dan adran yr NVC. Dwy gymuned nad ydynt yn dod o dan yr NVC ydy glaswellt a rhostir calchaidd, a disgrifir rhostir graean hefyd. Roedd tri phrif ddiben i’r prosiect hwn: - Cynnig trosolwg o adnodd rhostir yr iseldir yng Nghymru gan ganiatáu i raglenni cadwraeth lleol yn enwedig partneriaethau Cynlluniau Gweithredu Bioamrywiaeth lleol, asesu a dehongli eu hadnoddau mewn cyd-destun Cymreig. - Nodi mathau o rostir sydd wedi’u tangynrychioli yn y gyfres o SoDdGAau. - Nodi ble mae’r bylchau mewn gwybodaeth ac amlygu meysydd i’w hastudio ymhellach.

Identification

Dynodydd
Identifier
NRW_DS99344
Teitl Amgen
Alternative Title
  • PH2_Lowland_Heathland_veg.LYR
  • PH2_Lowland_Heathland_sites.LYR
  • PH2_Lowland_Heathland_notes_points.LYR
  • PH2_Lowland_Heathland_mospolys.LYR
Laith Metadata
Metadata Language
English
Lineage
Datganiad

A total of 13 surveys were carried out: Anglesey (1994), West Gwynedd (1993), Gwynedd and Anglesey (1994), Pembrokeshire (1995, 1996, 1997), Rivers Ystwyth and Rheidiol, Ceredigion (1995), Gower Commons (1997), Gower, Bridgend, Vale of Glamorgan, Conwy (1998), Powys (1999), Brecknock and Carmarthenshire (2000), Ceredigion (2001) and Gower (2001). The total area of heath surveyed is approximately 4714 ha which is 35% of the total area of lowland and coastal (maritime) heathland recorded in the phase 1 habitats survey of Wales (1979- 1997).


The age of the data is a limitation as habitat composition may change over time, a record of a vegetation type in the data is therefore no guarantee that it is still extant on the ground


Vegetation mapping and community definition followed the National Vegetation Classification (NVC). The dataset has been extensively validated and verified however problems were encountered when mapping in field which may have resulted in errors, digitisation was of poor quality and there were occasional problems with identifying community type.

Cynhaliwyd cyfanswm o 13 o arolygon: Môn (1994), Gorllewin Gwynedd (1993), Gwynedd a Môn (1994), Sir Benfro (1995, 1996, 1997), Afonydd Ystwyth a Rheidol, Ceredigion (1995), Tiroedd Comin Gŵyr (1997), Gŵyr, Pen-y-bont ar Ogwr, Bro Morgannwg, Conwy (1998), Powys (1999), Brycheiniog a Sir Gaerfyrddin (2000), Ceredigion (2001) a’r Gŵyr (2001). Mae cyfanswm arwynebedd y rhostir a arolygwyd yn tua 4714 ha sef 35% o gyfanswm arwynebedd rhostir yr iseldir a’r rhostir arfordirol (morol) a gofnodwyd yn arolwg cynefinoedd Cymru Cam 1 (1979- 1997).


Mae oedran y data yn ein cyfyngu gan y gall cyfansoddiad cynefinoedd newid dros amser, ac felly nid yw’r ffaith bod cofnod o fath o lystyfiant yn y data yn gwarantu bod y math hwnnw’n dal i fodoli ar lawr gwlad.


Roedd y gwaith mapio llystyfiant a diffinio cynefinoedd yn dilyn y Dosbarthiad Llystyfiant Cenedlaethol (NVC). Mae’r set ddata wedi’i dilysu a’i gwirio’n helaeth. Fodd bynnag, daethpwyd ar draws problemau wrth fapio yn y maes a allai fod wedi arwain at wallau. Roedd y digideiddio o ansawdd gwael a chafwyd problemau achlysurol o ran adnabod math o gymuned.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2026-07-07
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Countryside Council for Wales (CCW) -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

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


 
 

Distribution

Dosbarthiad
Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Geographic Information System ( Unknown )

    Specification

    MapInfo Tab

Lleolwr Adnoddau
Resource Locator
View and Download ( WWW:LINK-1.0-http--link )
Lleolwr Adnoddau
Resource Locator
Web Mapping Service ( OGC:WMS )
 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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
Datganiad

A total of 13 surveys were carried out: Anglesey (1994), West Gwynedd (1993), Gwynedd and Anglesey (1994), Pembrokeshire (1995, 1996, 1997), Rivers Ystwyth and Rheidiol, Ceredigion (1995), Gower Commons (1997), Gower, Bridgend, Vale of Glamorgan, Conwy (1998), Powys (1999), Brecknock and Carmarthenshire (2000), Ceredigion (2001) and Gower (2001). The total area of heath surveyed is approximately 4714 ha which is 35% of the total area of lowland and coastal (maritime) heathland recorded in the phase 1 habitats survey of Wales (1979- 1997).


The age of the data is a limitation as habitat composition may change over time, a record of a vegetation type in the data is therefore no guarantee that it is still extant on the ground


Vegetation mapping and community definition followed the National Vegetation Classification (NVC). The dataset has been extensively validated and verified however problems were encountered when mapping in field which may have resulted in errors, digitisation was of poor quality and there were occasional problems with identifying community type.

Cynhaliwyd cyfanswm o 13 o arolygon: Môn (1994), Gorllewin Gwynedd (1993), Gwynedd a Môn (1994), Sir Benfro (1995, 1996, 1997), Afonydd Ystwyth a Rheidol, Ceredigion (1995), Tiroedd Comin Gŵyr (1997), Gŵyr, Pen-y-bont ar Ogwr, Bro Morgannwg, Conwy (1998), Powys (1999), Brycheiniog a Sir Gaerfyrddin (2000), Ceredigion (2001) a’r Gŵyr (2001). Mae cyfanswm arwynebedd y rhostir a arolygwyd yn tua 4714 ha sef 35% o gyfanswm arwynebedd rhostir yr iseldir a’r rhostir arfordirol (morol) a gofnodwyd yn arolwg cynefinoedd Cymru Cam 1 (1979- 1997).


Mae oedran y data yn ein cyfyngu gan y gall cyfansoddiad cynefinoedd newid dros amser, ac felly nid yw’r ffaith bod cofnod o fath o lystyfiant yn y data yn gwarantu bod y math hwnnw’n dal i fodoli ar lawr gwlad.


Roedd y gwaith mapio llystyfiant a diffinio cynefinoedd yn dilyn y Dosbarthiad Llystyfiant Cenedlaethol (NVC). Mae’r set ddata wedi’i dilysu a’i gwirio’n helaeth. Fodd bynnag, daethpwyd ar draws problemau wrth fapio yn y maes a allai fod wedi arwain at wallau. Roedd y digideiddio o ansawdd gwael a chafwyd problemau achlysurol o ran adnabod math o gymuned.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • lowland heathland
  • inventories
  • geographical information systems (GIS)
  • heathland (heaths)
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-07-07
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
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. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-3939333434 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Phase 2 Lowland Heathland Survey of Wales (paper data)

NRW_DS109736
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-07-08T16:43:00.522Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
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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