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Metadata: Lower Limit of Marine Intertidal Phase 1 Survey
Abstract:
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.
Data holder:
Natural Resources Wales (NRW)
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8606 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Lower Limit of Marine Intertidal Phase 1 Survey |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | LAT-revised.TAB, CCW derived Lowest Astronomical Tide (approximate LAT) |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | NRW_DS109814 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313039383134 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 1996-04-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2005-10-31 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | 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. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | 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. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Hydrography |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Lowest Astronomical Tide | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | geographical information systems (GIS) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | mapping (map drawing) (cartography)(see also digital mapping) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sea level | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.513067 |
| East | The eastern-most limit of the data resource in decimal degrees | -2.608865 |
| South | The southern-most limit of the data resource in decimal degrees | 51.240829 |
| West | The western-most limit of the data resource in decimal degrees | -5.777741 |
| Regional sea | benthic boundary layer | |
| Wales (WLS) | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Countryside Council for Wales (CCW) | |
| Delivery point | Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | 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. |
| no limitations | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | © 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. |
| This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | 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. | |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Geographic Information System |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2005-10-31 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-03 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |