Uwch-Conwy Drone Survey October 2020
The 10 sites were flown between the 10th and 16th September 2020 over the Uwch-Conwy peatlands.
All sites were surveyed using an RGB vertical camera, then the data processed to produce digital surface models (DSM) and orthomosaics.
The DSMs were processed to generate catchment, flow and contour vector data sets to assist with the peatbog restoration planning.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS125236
- Metadata Language
- English
- Lineage
-
The accuracy of the resulting orthomosaic and digital surface models is dependent on a range of factors, including:
• The height of the camera above the terrain – this varies depending on the ruggedness of the terrain.
• The contrast and detail in the terrain – featureless and uniform vegetation provides fewer opportunities to match points between photographs resulting in lower accuracy
• Light levels – imagery flown on a bright day will have sharper images, resulting in more accurate pattern matching and thus registration
• The GPS satellite configuration at the time of the survey
• The proximity of the survey area to the GPS base stations used for applying positional corrections.
As a result, the accuracy will vary between the sites and within each site.
The surveys were generally flown in moderate to good light conditions with the GPS positions post-processed using Leica SmartNet corrections and map projection transformations carried out using Ordnance Survey OSTN15 corrections, so the absolute positional accuracy should be better than 10cm in plan and 15cm in height.
For all of the Camera and Drone details, please see accompanying report.
- Additional Information
-
The full data report also provides additional site details on the flight path and resolution achieved for each survey. This report should accompany the data. Uwch_Conwy_DroneSurvey_Oct2020_DataReport.pdf
Aerial survey report: Uwch Conwy Air survey of 10 upland peatbog sites in North Wales November 2020 Exegenesis Spatial Data Management
- Dataset Reference Date (Publication)
- 2020-11-30
Temporal Extent
- Begin date
- 2020-10-01
- End date
- 2020-11-01
- Topic category
-
- Geoscientific information
- Inland waters
- Imagery base maps earth cover
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
-
-
Geographic Information System
(
Unknown
)
- Specification
-
ESRI Feature Classes: 1. UwchConwy_dsm 2. UwchConwy_Orthomosaic 3. UwchConwy_water 4. UwchConwy _dsm_contours_50cm 5. UwchConwywatershed_stream_segments 6. UwchConwy_hag_line 7. UwchConwy_watershed_basins 8. UwchConwy_site_boundaries 9. UwchConwy_peat 10. UwchConwy_hag Mp3 GylcheddFlyby.mp4 10 sites included: Uwch Conwy Sites: Site1_YGylchedd Site2_BroAledCommon Site3_SwchMaesGwyn Site4_MaesMerddyn Site5_NantyCreuau Site6_HafodreIsa Site7_CerniogeMawr Site8_LlechweddDiffwys Site9_FoelMarchyriaPlateaux Site10_NantyGwryd
-
Geographic Information System
(
Unknown
)
Quality
Data quality
- Quality Scope
- Dataset
- 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
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
The accuracy of the resulting orthomosaic and digital surface models is dependent on a range of factors, including:
• The height of the camera above the terrain – this varies depending on the ruggedness of the terrain.
• The contrast and detail in the terrain – featureless and uniform vegetation provides fewer opportunities to match points between photographs resulting in lower accuracy
• Light levels – imagery flown on a bright day will have sharper images, resulting in more accurate pattern matching and thus registration
• The GPS satellite configuration at the time of the survey
• The proximity of the survey area to the GPS base stations used for applying positional corrections.
As a result, the accuracy will vary between the sites and within each site.
The surveys were generally flown in moderate to good light conditions with the GPS positions post-processed using Leica SmartNet corrections and map projection transformations carried out using Ordnance Survey OSTN15 corrections, so the absolute positional accuracy should be better than 10cm in plan and 15cm in height.
For all of the Camera and Drone details, please see accompanying report.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- drone survey
- lowland peatlands
- aerial surveys
- Type
- Theme
Citation
- Date (Publication)
- 2025-01-08
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Aerial Survey Report Uwch Conwy Air survey of 10 upland peatbog sites in North Wales November 2020
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
Access restrictions on this data are currently being determined. It may contain third party information and therefore may be restricted under legislation. NRW may provide access to this dataset on request in some limited circumstances, however at this stage NRW may not release, publish or disseminate the data without further assessment.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
Data may only be re-used externally under provision and in line with the terms of a NRW licence following an assessment of the data.
Attribution Statement
- Other constraints
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Licence
- Other constraints
- NRW Conditional
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313235323336 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2025-09-25T10:52:07.332Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0