4f4c4942-4343-5764-6473-313235323336 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-09-25T10:52:07.332Z NRW 1.0 wel British National Grid (EPSG::27700) Uwch-Conwy Drone Survey October 2020 Uwch-Conwy Drone Survey October 2020 Arolwg Drôn Uwch-Gonwy Hydref 2020 2020-11-30 NRW_DS125236 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. 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. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en exeGesIS SDM Ltd Great House Barn, New Street, Talgarth, LD3 0HU info@esdm.co.uk http://www.esdm.co.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Land cover Hydrography Land use GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme drone survey lowland peatlands aerial surveys NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml IPSV Subjects List 2020-11-18 geonetwork.thesaurus.external.theme.subjects NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords 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. no limitations 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. NRW Conditional English geoscientificInformation inlandWaters imageryBaseMapsEarthCover SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -4.001664 -3.610683 52.709879 53.1125995 2020-10-01 2020-11-01 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 Aerial Survey Report Uwch Conwy Air survey of 10 upland peatbog sites in North Wales November 2020 Geographic Information System Unknown 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 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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. 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.