NRW_DS101871 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T12:00:41 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Collated Saltmarsh Survey of Wales (1994 - 2004) (archived data) Collated Saltmarsh Survey of Wales (1994 - 2004) (archived data) Arolwg o Gorsydd Heli Cymru Collated Saltmarsh Derived GIS Layer 2004-12-31 publication 4f4c4942-4343-5764-6473-313031383731 This, now static, dataset was collected to monitoring the progress of saltmarsh development across Wales, between 1994 and 2002. The dataset comprises of a collation of biological data recorded across different saltmarsh environments. This dataset is now archived, as more up-to-date information is available about saltmarsh habitats across Wales. However this still forms an important baseline dataset in which to monitor the health and species richness across saltmarshes and overtime. This will help inform conservation management requirements for the important saltmarsh habitats. The more up-to-date surveys can be found in the following metadata entry: 114725 Priority Marine Habitats of Wales (coastal saltmarsh). This, now static, dataset was collected to monitoring the progress of saltmarsh development across Wales, between 1994 and 2002. The dataset comprises of a collation of biological data recorded across different saltmarsh environments. This dataset is now archived, as more up-to-date information is available about saltmarsh habitats across Wales. However this still forms an important baseline dataset in which to monitor the health and species richness across saltmarshes and overtime. This will help inform conservation management requirements for the important saltmarsh habitats. The more up-to-date surveys can be found in the following metadata entry: 114725 Priority Marine Habitats of Wales (coastal saltmarsh). Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian Countryside Council for Wales (CCW) Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme saltmarsh ecology habitat mapping saltmarsh (salt-marsh) (salt marsh) habitat management saltmarsh vegetation theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Habitat extent theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions). no limitations otherRestrictions © CNC/NRW and © Crown copyright 2004. Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination 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. NRW Conditional vector eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision benthic boundary layer NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 1994-01-01 2004-12-31 Geographic Information System Unknown [A] Mapinfo: Phase 2 quadrat data and polygons GIS dataset 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 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false The structure of this data layer was updated in 2011 as part of a project to develop a series of priority and protected spatial marine habitat layers. The survey methodology used to collect this dataset either followed the National Vegetation Classification (NVC) Phase 2 methodology or intertidal Phase 1 methodology. The habitats were mapped using GIS against either OS maps or Aerial photographs. The NVC Saltmarsh layer was identified as most accurate of the three layers collated and therefore forms the base of the collation. All polygons extracted from the Phase 1 Intertidal Saltmarsh data that intersect with the NVC polygons were erased. Where 2 NVC survey overlap the most recently surveyed is taken as the most accurate. All polygons from the 1:50,000 OS map that intersect with either the NVC Saltmarsh layer or the extracted Phase 1 Intertidal Saltmarsh were also erased. The structure of this data layer was updated in 2011 as part of a project to develop a series of priority and protected spatial marine habitat layers. The survey methodology used to collect this dataset either followed the National Vegetation Classification (NVC) Phase 2 methodology or intertidal Phase 1 methodology. The habitats were mapped using GIS against either OS maps or Aerial photographs. The NVC Saltmarsh layer was identified as most accurate of the three layers collated and therefore forms the base of the collation. All polygons extracted from the Phase 1 Intertidal Saltmarsh data that intersect with the NVC polygons were erased. Where 2 NVC survey overlap the most recently surveyed is taken as the most accurate. All polygons from the 1:50,000 OS map that intersect with either the NVC Saltmarsh layer or the extracted Phase 1 Intertidal Saltmarsh were also erased.