Lower Limit of Marine Intertidal Phase 1 Survey

  • English
  • wel
  • All

This is a GIS dataset line dataset depicting an approximation of the Lowest Astronomical Tide, through digitising along a combination of the OS 1:50,000 intertidal boundary and the lowest survey points of the Countryside Council for Wales (CCW) marine intertidal phase 1 mapping survey. The purpose of this data capture was to define the lowest boundary of the intertidal zone, which has relevance when defining Site of Special Scientific Interest (SSSI) boundaries for intertidal features. All SSSI's designated after the CCW Phase 1 mapping survey use this as their lowest limit.

Identification

Dynodydd
Identifier
NRW_DS109814
Teitl Amgen
Alternative Title
  • LAT-revised.TAB
  • CCW derived Lowest Astronomical Tide (approximate LAT)
  • Terfyn Isaf Arolwg Cam 1 Rhynglanwol Morol
Laith Metadata
Metadata Language
English
Lineage

Derived from the OS MasterMap intertidal lowest boundary and the CCW marine intertidal Phase 1 mapping survey. The CCW survey provides information on communities within the intertidal zone as a seamless layer. The lowest boundary of the survey, completed during spring tides, approximates to the lowest astronomic tide in most cases, although other factors influence the tide heights such as freshwater input in estuaries and storm surge. The intertidal habitat mapping began in 1996 and was completed in 2005. All work has been undertaken by CCW's in house intertidal survey team. Production of the Lowest Astronomical Tide (LAT) dataset was completed by CCW cartographic unit. The combination of OS features (dated pre year 2001) and CCW mapped features (between 1996 and 2005) does not give an actual boundary, but an indication of some of the possibilities of where the boundary may lie. In dynamic locations, such as estuaries and sedimentary embayments, changing sandbanks and channels makes for an unrealistic LAT. The lowest boundary of the CCW survey, completed during spring tides, approximates to the lowest astronomical tide in most cases, although other factores influence the tide height such as freshwater input in estuaries and storm surge.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2005-10-31
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


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer
 
 

Distribution

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

    Specification

    MapInfo.TAB

 

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
Degree
false
Lineage

Derived from the OS MasterMap intertidal lowest boundary and the CCW marine intertidal Phase 1 mapping survey. The CCW survey provides information on communities within the intertidal zone as a seamless layer. The lowest boundary of the survey, completed during spring tides, approximates to the lowest astronomic tide in most cases, although other factors influence the tide heights such as freshwater input in estuaries and storm surge. The intertidal habitat mapping began in 1996 and was completed in 2005. All work has been undertaken by CCW's in house intertidal survey team. Production of the Lowest Astronomical Tide (LAT) dataset was completed by CCW cartographic unit. The combination of OS features (dated pre year 2001) and CCW mapped features (between 1996 and 2005) does not give an actual boundary, but an indication of some of the possibilities of where the boundary may lie. In dynamic locations, such as estuaries and sedimentary embayments, changing sandbanks and channels makes for an unrealistic LAT. The lowest boundary of the CCW survey, completed during spring tides, approximates to the lowest astronomical tide in most cases, although other factores influence the tide height such as freshwater input in estuaries and storm surge.
 

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
  • marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
  • geographical information systems (GIS)
  • mapping (map drawing) (cartography)(see also digital mapping)
  • Lowest Astronomical Tide
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Sea level
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

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

The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. There are no access restrictions on this data. However there are third party use restrictions.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW and © Crown copyright. All rights reserved. Natural Resources Wales, AC0000849444 Data may be re-used under provision and in line with the terms of a NRW licence. Those seeking commercial re-use require a commercial licence available from the OS.
 

Attribution Statement

Other constraints

NRW Conditional
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313039383134 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-12-09T12:42:12.339Z
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

Access the portal