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Metadata: Results of a study into the use of airborne remote sensing to identify habitats and biotopes in the Mawddach estuary
Abstract:
This dataset contains the results of a study into the use of airborne remote sensing to produce a comprehensive thematic map of biotope and sediment type distribution in the Mawddach estuary. The purpose of this data capture was to be able to report on the condition of the Mawddach estuary a number of provisional attributes have been identified which may require monitoring e.g. the relative proportion of sandy and muddy biotopes and distribution of major communities. This project investigated the possibility of using remotely sensed data to provide a contextual overview of broad-scale attributes in a monitoring programme.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8907 |
| 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. | Results of a study into the use of airborne remote sensing to identify habitats and biotopes in the Mawddach estuary |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Section 3.4.4: Contract sceince report No. 380, MMR No. 1 |
| 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_DS87141 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-3837313431 |
| 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 | 1999-10-07 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2001-04-30 |
| 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 dataset contains the results of a study into the use of airborne remote sensing to produce a comprehensive thematic map of biotope and sediment type distribution in the Mawddach estuary. The purpose of this data capture was to be able to report on the condition of the Mawddach estuary a number of provisional attributes have been identified which may require monitoring e.g. the relative proportion of sandy and muddy biotopes and distribution of major communities. This project investigated the possibility of using remotely sensed data to provide a contextual overview of broad-scale attributes in a monitoring programme. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The survey was carried out over an 80 minute period. Initial surveying was carried out at 2000 feet to obtain a swath of imagery covering the entire width of the estuary. This was followed by a 1000 feet survey along the predetermined flight-lines. True colour video, infra-red video and hyperspectral data were recorded during the entire survey and recording was synchronised to GPS time for all video data. All data acquired during the survey were recorded on analogue video tapes, these required digitising before processing. Data capture operations produced 1) raw colour and infra-red image frames, 2) raw hyperspectral reflectance data, 3) Georeferenced database record of flight line. Processing of this imagery included geometric, radiometric and bi-directional reflectance corrections in order to produce a thematic map of biotope/ sediment/ vegetation distribution. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Environmental monitoring facilities | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | aerial photography (air photography) (aerial photographs) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | aerial surveys | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | remote sensing | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Mawddach Estuary | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | estuaries (see also specific estuary names) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.76861286 |
| East | The eastern-most limit of the data resource in decimal degrees | -3.8898286 |
| South | The southern-most limit of the data resource in decimal degrees | 52.68612831 |
| West | The western-most limit of the data resource in decimal degrees | -4.08420032 |
| Regional sea | 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 | Spectral Signatures Ltd. | |
| Delivery point | NovaUCD, NovaUCD, Belfield, Dublin 4, Ireland | |
| info@spectral.ie | ||
| URL | http://www.spectral.ie/ | |
| 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 CCW and the Ordnance Survey. CCW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general 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. | © CCGC/CCW and © Crown copyright [2001]. All rights reserved. Countryside Council for Wales, AC0000849444. Third parties seeking to re-use this data require a Licence issued by CCW. 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. |
| 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 | Documents |
| 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. | 2001-04-30 |
| 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 |