Collated Saltmarsh Survey of Wales (1994 - 2004) (archived data)
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).
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS101871
- Alternative Title
-
- Collated Saltmarsh Derived GIS Layer
- Metadata Language
- English
- Lineage
-
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.
- Dataset Reference Date (Publication)
- 2004-12-31
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
benthic boundary layer
Distribution
- Format Type and Description
-
-
Geographic Information System
(
Unknown
)
- Specification
-
[A] Mapinfo: Phase 2 quadrat data and polygons GIS
-
Geographic Information System
(
Unknown
)
Quality
Data quality
- Quality Scope
- Dataset
- 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
-
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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- saltmarsh ecology
- habitat mapping
- saltmarsh (salt-marsh) (salt marsh)
- habitat management
- saltmarsh vegetation
- Type
- Theme
Citation
- Date (Publication)
- 2025-01-08
Keywords
-
SeaDataNet Parameter Discovery Vocabulary
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Priority Marine Habitats of Wales: Coastal Saltmarsh
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
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).
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© 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.
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
- NRW Conditional
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313031383731 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2026-03-03T12:00:41.014Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0