Change in saltmarsh extent for six regions across Great Britain (1846-2016)
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Identification info
- Metadata Language
- English (en)
- Character set
- utf8
- Dataset Reference Date ()
- 2019-09-18
- Dataset Reference Date ()
- 2019-05-15
- Identifier
- doi: / 10.5285/03b62fd0-41e2-4355-9a06-1697117f0717
- Other citation details
- Ladd, C.J.T., Duggan-Edwards, M.F., Bouma, T.J., Pagès, J.F., Skov, M.W. (2019). Change in saltmarsh extent for six regions across Great Britain (1846-2016). NERC Environmental Information Data Centre 10.5285/03b62fd0-41e2-4355-9a06-1697117f0717
- Maintenance and update frequency
- notPlanned
- GEMET - INSPIRE themes, version 1.0 ()
-
- Habitats and Biotopes
- Limitations on Public Access
- otherRestrictions
- Other constraints
- no limitations
- Use constraints
- otherRestrictions
- Other constraints
- © Bangor University
- Use constraints
- otherRestrictions
- Other constraints
- © Royal Netherlands Institute for Sea Research
- Use constraints
- otherRestrictions
- Other constraints
- © Centre d’Estudis Avançats de Blanes
- Use constraints
- otherRestrictions
- Use constraints
- otherRestrictions
- Other constraints
- If you reuse this data, you should cite: Ladd, C.J.T., Duggan-Edwards, M.F., Bouma, T.J., Pagès, J.F., Skov, M.W. (2019). Change in saltmarsh extent for six regions across Great Britain (1846-2016). NERC Environmental Information Data Centre https://doi.org/10.5285/03b62fd0-41e2-4355-9a06-1697117f0717
- Spatial representation type
- vector
- Distance
- 5 urn:ogc:def:uom:EPSG::9001
- Topic category
-
- Biota
- Environment
- Begin date
- 1846-06-01
- End date
- 2016-05-26
Distribution Information
- Data format
-
-
Shapefile
()
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Shapefile
()
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Supporting information
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- Quality Scope
- dataset
- Other
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- The aerial extent change in saltmarsh extent across Great Britain came into existence by using Ordnance Survey (OS) maps and aerial photographs to delineate marsh extent for each estuary.. Marsh extent was delineated in ArcGIS 10.6 at a scale of 1:7,500 by placing vertices every 5m along the marsh edge. A Root Mean Square Error (RMSE) term (in meters) was calculated for each marsh complex by assessing error introduced by: (i) inaccuracies in the basemap used to georeference maps and aerial photographs; (ii) the georeferencing procedure itself; (iii) the interpreter when placing vertices on the marsh edge; and (iv) map and photo distortions that occurred prior to digitisation. To qualitatively assess whether the vectorised layer could be considered accurate, the most recent digitised marsh extent was compared against national marsh extent layers to ensure general agreement. Literature searches were also done to verify whether observations of significant change in marsh extent were reliable, or whether errors introduced by map surveyors on the location of the marsh edge likely explain the differences.
Metadata
- File identifier
- 03b62fd0-41e2-4355-9a06-1697117f0717 XML
- Metadata Language
- English (en)
- Character set
- ISO/IEC 8859-1 (also known as Latin 1)
- Resource type
- dataset
- Hierarchy level name
- dataset
- Metadata Date
- 2024-02-27T16:28:54
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3