Bait digging areas 2019/2020
The data has been collected under a contract run under the Wales non-licensable activities project. Bait digging and collection of living resources was identified as an activity which is causing damage to the Marine Protection Area (MPA) network in Wales. The data obtained from this contract provides NRW with evidence which will help inform discussions around future management of this activity. A GIS layer was created through interpretation of the visible evidence of bait digging from the aerial images (NRW_DS124825 Bait digging areas aerial imagery 2019/2020). The GIS layer was created by digitising around areas identified as impacted by bait digging. In addition the layer displays site name, confidence in intrepretation, the age of the evidence (old/new) and digging intensity (low, medium and high) along with who captured the data, the date and image date.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS124806
- Alternative Title
-
- Intertidal Drone Photos 2019-2020.lyr
- Bait digging areas (2019-2020).lyr
- Ardaloedd cloddio am abwyd 2019/2020
- Metadata Language
- English
- Lineage
-
To produce the GIS layer (BaitDiggingAreas_2019_2020), a virtual raster was created for each site using the aerial imagery as tiles. A 100m grid was applied over each site to ensure all areas of the site were examined. Aerial imagery was inspected at 1:250 scale. A scale of 1:500 was used to review areas where evidence of bait digging was not expected, and squares checked off when reviewed. The site surveyor and the digitiser discussed mapping of polygons in the areas visited by foot. The digitiser established what could be identified. It should be acknowledged that this layer has been created using the contractor’s interpretation of imagery (along with some ground truthing) and is not likely to respresent a complete picture of damage at these sites. It also represents a snapshot in time.
- Additional Information
-
Perrins, J., Lush, M., Taylor, T., Holt, R and Bunker, F. 2020. Investigating the location and intensity of bait digging in Wales. NRW Evidence Report Series Report No: 449, 170pp, NRW, Bangor.
- Dataset Reference Date (Publication)
- 2020-07-08
Temporal Extent
- Begin date
- 2019-09-30
- End date
- 2020-03-13
- Topic category
-
- Environment
- Biota
- Oceans
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
littoral
Distribution
- Format Type and Description
-
-
Geographic Information System
()
- Specification
-
There are the following outputs from this contract: - spatial ESRI GIS layer. There are also 15 x .geotiffs (aerial images of 12 intertidal sites in Wales), see separate metadata entry. Also supplied as part of the contract is: - A series of PDFs which contain the mapping processing notes - A series of word documents which have raw site reports - .tiff files (Digital surface models)
-
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
To produce the GIS layer (BaitDiggingAreas_2019_2020), a virtual raster was created for each site using the aerial imagery as tiles. A 100m grid was applied over each site to ensure all areas of the site were examined. Aerial imagery was inspected at 1:250 scale. A scale of 1:500 was used to review areas where evidence of bait digging was not expected, and squares checked off when reviewed. The site surveyor and the digitiser discussed mapping of polygons in the areas visited by foot. The digitiser established what could be identified. It should be acknowledged that this layer has been created using the contractor’s interpretation of imagery (along with some ground truthing) and is not likely to respresent a complete picture of damage at these sites. It also represents a snapshot in time.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
-
- bait digging (bait collecting)
- intertidal
- ragworms
- lugworms
- remote sensing
- drone survey
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
Part of this dataset is sensitive. Sensitive data must be kept confidential; general release is not permitted due to risk of harm to the environment or third parties.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW Data may be re-used under provision and in line with the terms of a NRW licence. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and database right. All rights reserved.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313234383036 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:31:39.652Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0