Bait digging areas 2019/2020

  • English
  • wel
  • All

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

Dynodydd
Identifier
NRW_DS124806
Teitl Amgen
Alternative Title
  • Intertidal Drone Photos 2019-2020.lyr
  • Bait digging areas (2019-2020).lyr
  • Ardaloedd cloddio am abwyd 2019/2020
Laith Metadata
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.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2020-07-08
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  exeGesIS SDM Ltd
Great House Barn, New Street, Talgarth, LD3 0HU
http://www.esdm.co.uk/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

littoral
 
 

Distribution

Fformat - Math a Disgrifiad
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)

 

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

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

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
  • bait digging (bait collecting)
  • intertidal
  • ragworms
  • lugworms
  • remote sensing
  • drone survey
Math
Type
Theme
Theme

Dyfyniad
Citation

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

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

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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313234383036 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:31:39.652Z
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