4f4c4942-4343-5764-6473-313038383030 English Natural Resources Wales Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/?lang=eng 2026-03-03T12:00:17.19Z NRW 1.0 wel British National Grid (EPSG::27700) Phase 2 Saltmarsh Survey of Wales Phase 2 Saltmarsh Survey of Wales Arolwg Cam 2 Morfeydd Heli Cymru PH2 Saltmarsh Vegetation.lyr PH2 Saltmarsh Target Notes.lyr PH2 Saltmarsh Surveys.lyr PH2 Saltmarsh Sites.lyr PH2 Saltmarsh Quadrats font.lyr PH2 Saltmarsh Photo points.lyr Ph2_Saltmarsh_Mosaic.dbf 2022-08-04 NRW_DS108800 This National Vegetation Classification (NVC) Phase 2 project and corresponding datasets are a collation of mapped saltmarsh habitats across Wales. This data was collected to provide an overview of saltmarshes across Wales. The surveys were conducted between 1990 and 2003. The dataset has been extensively validated and verified. However, habitat composition may change over time due to successional trends, land management or even planned developments. A record of a vegetation type or species in the digital data is therefore no guarantee that it is still extant on the ground. Coastal saltmarshes in the UK comprise of the upper, vegetated portions of intertidal mudflats, lying approximately between mean high water neap tides and mean high water spring tides. Saltmarshes are usually restricted to comparatively sheltered locations in five main physiographic situations: in estuaries, in saline lagoons, behind barrier islands, at the heads of sea lochs, and on beach plains. The development of saltmarsh vegetation is dependent on the presence of intertidal mudflats. Communities are additionally affected by differences in climate, the particle size of the sediment and, within estuaries, by decreasing salinity in the upper reaches. This National Vegetation Classification (NVC) Phase 2 project and corresponding datasets are a collation of mapped saltmarsh habitats across Wales. This data was collected to provide an overview of saltmarshes across Wales. The surveys were conducted between 1990 and 2003. The dataset has been extensively validated and verified. However, habitat composition may change over time due to successional trends, land management or even planned developments. A record of a vegetation type or species in the digital data is therefore no guarantee that it is still extant on the ground. Coastal saltmarshes in the UK comprise of the upper, vegetated portions of intertidal mudflats, lying approximately between mean high water neap tides and mean high water spring tides. Saltmarshes are usually restricted to comparatively sheltered locations in five main physiographic situations: in estuaries, in saline lagoons, behind barrier islands, at the heads of sea lochs, and on beach plains. The development of saltmarsh vegetation is dependent on the presence of intertidal mudflats. Communities are additionally affected by differences in climate, the particle size of the sediment and, within estuaries, by decreasing salinity in the upper reaches. Mae'r prosiect Dosbarthiad Llystyfiant Cenedlaethol Cyfnod 2 hwn a'i setiau data cysylltiedig yn gasgliad o gynefinoedd morfa heli sydd wedi'u mapio ledled Cymru. Casglwyd y data hwn i ddarparu trosolwg o forfeydd heli ledled Cymru. Cynhaliwyd yr arolygon rhwng 1990 a 2003. Mae'r set ddata wedi'i chadarnhau a'i dilysu'n drwyadl. Fodd bynnag, gall cyfansoddiad cynefinoedd newid dros amser o ganlyniad i dueddiadau olynol, rheolaeth tir neu hyd yn oed ddatblygiadau arfaethedig. Felly, ni ellir bod yn sicr bod math o lystyfiant neu rywogaeth yn parhau i fodoli am ei fod wedi'i gofnodi yn y data digidol. Cydnabyddiaeth: 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. 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 Various Enquiries Unit, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ Data Services Team Natural Resources Wales (NRW), Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme vegetation (see also specific types eg.coastal or heathland vegetation and vegetation surveys) species inventory habitat surveys (habitat monitoring) Phase 2 Survey (Phase II) saltmarsh (salt-marsh) (salt marsh) National Vegetation Classification (NVC) vegetation surveys (vegetation monitoring)(see also biologicalsurveys) vegetation classification habitat mapping NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat extent SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml Ecosystem (SMNR) Animals, Plants and Other Organisms (SMNR) Sea and Coast (SMNR) Soils (SMNR) Soil and Land (SMNR) Coastal Margins (SMNR) Natural Resources (Incl. Features and Processes) (SMNR) Sustainable Management of Natural Resources (SMNR) Management Areas (SMNR) NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords This dataset contains 'simple derived data' which is jointly owned by NRW and the Ordnance Survey in the form of polygon GIS tables. NRW may release, publish or disseminate these components freely, providing recipients are made aware of use restrictions (see below). Data not derived from OS products have no access or use restrictions. Third party recipients may reproduce, disseminate and re-use this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. To avoid using old information, we recommend that the latest version is obtained from the original source. no limitations © CNC/NRW and © Crown copyright. All rights reserved. Natural Resources Wales, AC0000849444 [2016]. © Hawlfraint y Goron. Cedwir pob hawl. Cyfoeth Naturiol Cymru AC0000849444 [2016] This dataset contains 'simple derived data' which is jointly owned by NRW and the Ordnance Survey in the form of polygon vector data- vegetation, site boundary and vegetation mosaic MapInfo tables. Third parties seeking to re-use this dataset require a NRW licence. It allows reproduction, dissemination and re-use in any format or medium but only for non-commercial purposes according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS. 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. Open Government Licence English environment boundaries biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 inapplicable Wales (WLS) -5.777741 -2.608865 51.240829 53.513061 1993-08-24 2003-08-06 Documents Each individual survey has a paper report- see separate metadata entries. Database Recorder 6 [A] Species data held in Recorder 6 Geographic Information System Unknown [B] An all Wales collated GIS product including the following spatial information: - Vegetation polygons (ArcGIS) - Mosaic information (ArcGIS) - Site Boundaries (ArcGIS) - Survey Boundary (ArcGIS) - Quadrat points (ArcGIS) - Target Note points (ArcGIS) - Photo points (ArcGIS) https://datamap.gov.wales/layergroups/geonode:nrw_phase_2_salt_marsh WWW:LINK-1.0-http--link View and Download https://datamap.gov.wales/capabilities/layergroup/3605/?access_token=i61nd1X0RwdwAgQrGW0sqAsWxBMiwx&ows_service=wms OGC:WMS Web 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 This dataset is one of a series of major Phase 2 lowland habitat surveys including former Countryside Council for Wales’ (CCW) in-house and commissioned surveys covering grassland, woodland, heathland, peatland and sand dunes. Dataset is a collation of 14 NRW commissioned NVC surveys carried out on saltmarshes across Wales. Individual surveys utilised standard NVC Phase 2 survey methodology and community definition follows the National Vegetation Classification. Habitats were mapped using GIS against either OS maps or aerial photographs. Target notes and quadrat species lists were compiled. Data collected by trained personnel, digitised by contractors, validated by NRW KMG, corrections made by contractors, validated again by NRW KMG, corrections made in-house in conjunction with relevant salt marsh specialist. This dataset has contribute towards the monitoring of Special Area of Conservation, which includes: Carmarthen Bay and Estuaries / Bae Caerfyrddin ac Aberoedd; Glannau Môn: Cors heli / Anglesey Coast: Saltmarsh; Pembrokeshire Marine / Sir Benfro Forol; Pen Llyn a`r Sarnau / Lleyn Peninsula and the Sarnau; Dee Estuary / Aber Dyfrdwy and Severn Estuary / Môr Hafren. This dataset is one of a series of major Phase 2 lowland habitat surveys including former Countryside Council for Wales’ (CCW) in-house and commissioned surveys covering grassland, woodland, heathland, peatland and sand dunes. Dataset is a collation of 14 NRW commissioned NVC surveys carried out on saltmarshes across Wales. Individual surveys utilised standard NVC Phase 2 survey methodology and community definition follows the National Vegetation Classification. Habitats were mapped using GIS against either OS maps or aerial photographs. Target notes and quadrat species lists were compiled. Data collected by trained personnel, digitised by contractors, validated by NRW KMG, corrections made by contractors, validated again by NRW KMG, corrections made in-house in conjunction with relevant salt marsh specialist. This dataset has contribute towards the monitoring of Special Area of Conservation, which includes: Carmarthen Bay and Estuaries / Bae Caerfyrddin ac Aberoedd; Glannau Môn: Cors heli / Anglesey Coast: Saltmarsh; Pembrokeshire Marine / Sir Benfro Forol; Pen Llyn a`r Sarnau / Lleyn Peninsula and the Sarnau; Dee Estuary / Aber Dyfrdwy and Severn Estuary / Môr Hafren.