{"accessLimitation":{"value":"registrationRequired","availability":"Available","description":"Access to the resource is limited to users who have created a user account or registered with the service providing access to the resource.","uri":"http://vocab.nerc.ac.uk/collection/N07/current/RACC/"},"authors":[{"familyName":"Smyth","givenName":"T.A.G.","organisationName":"University of Huddersfield","role":"author","email":"t.ag.smyth@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-1740-762X","fullName":"Smyth, T.A.G."},{"familyName":"Wilson","givenName":"R.","organisationName":"University of Huddersfield","role":"author","email":"R.Wilson2@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0001-9063-8021","fullName":"Wilson, R."}],"availability":"Available","boundingBoxes":[{"westBoundLongitude":-5.473,"eastBoundLongitude":-2.654,"southBoundLatitude":51.375,"northBoundLatitude":53.434,"bounds":"{\"type\": \"Feature\",      \"properties\": {},      \"geometry\": {        \"type\": \"Polygon\",        \"coordinates\": [[[-5.473, 51.375], [-5.473, 53.434], [-2.654, 53.434], [-2.654, 51.375], [-5.473, 51.375]]]      }}","coordinates":"[[[-5.473, 51.375], [-5.473, 53.434], [-2.654, 53.434], [-2.654, 51.375], [-5.473, 51.375]]]"}],"citation":{"authors":["Smyth, T.A.G.","Wilson, R."],"bibtex":"https://catalogue.ceh.ac.uk/documents/ac7071cb-79a3-400d-9f17-13dc4a657083/citation?format=bib","day":15,"doi":"10.5285/ac7071cb-79a3-400d-9f17-13dc4a657083","month":11,"publisher":"NERC EDS Environmental Information Data Centre","resourceTypeGeneral":"dataset","ris":"https://catalogue.ceh.ac.uk/documents/ac7071cb-79a3-400d-9f17-13dc4a657083/citation?format=ris","title":"Aerial imagery of Ynyslas coastal sand dunes, Wales in 2020","url":"https://doi.org/10.5285/ac7071cb-79a3-400d-9f17-13dc4a657083","year":2022},"custodians":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"}],"datasetReferenceDate":{"publicationDate":"2022-11-15"},"description":"The data contains Aerial imagery of Ynyslas Dunes, Wales saved in a GeoTiff format. The imagery covers 8000 m2 of a discrete coastal sand dune at northern distal end of a spit in Dyfi National Nature Reserve. Data was collected during a six-minute flight on 5th February 2020 made by a DJI Mavic Pro 2 uncrewed aerial vehicle (UAV). The flight was planned with Pix4DCapture based on a ground pixel resolution of 0.01 m. Lateral and longitudinal overlap was set to 80%. Prior to flying, eight (5.8 per 100 photos) Ground Control Points (GCPs) were evenly distributed throughout the dune and their location surveyed using a differential global positioning system (DGPS).\n\nOrthorectification and mosaicking of the aerial imagery collected was performed using Pix4Dmapper utilising a fully automated workflow based on Structure-from-Motion (SFM) digital photogrammetry algorithms. The data was collected to test the accuracy and repeatability of bare sand and vegetation cover in dunes mapped from aerial imagery. Data was collected and processed by Dr Ryan Wilson (University of Huddersfield) and interpreted by Dr Thomas Smyth (University of Huddersfield). \n\nThe work was supported by the Natural Environment Research Council NE/T00410X/1. ","distributionFormats":[{"name":"TIFF","type":"image/tiff","version":"unknown"}],"distributorContacts":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"distributor","email":"info@eidc.ac.uk"}],"funding":[{"funderName":"Natural Environment Research Council","funderIdentifier":"https://ror.org/02b5d8509","awardTitle":"Landscape-scale environmental drivers of coastal dune mobility","awardNumber":"NE/T00410X/1","awardURI":"https://gtr.ukri.org/projects?ref=NE/T00410X/1","orcid":false,"ror":true}],"id":"ac7071cb-79a3-400d-9f17-13dc4a657083","incomingCitationCount":1,"incomingCitations":[{"description":"Smyth, T.A.G., Wilson, R., Rooney, P., & Yates, K.L. (2022). Extent, accuracy and repeatability of bare sand and vegetation cover in dunes mapped from aerial imagery is highly variable. In Aeolian Research (Vol. 56, p. 100799). Elsevier BV.","url":"https://doi.org/10.1016/j.aeolia.2022.100799"}],"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/ac7071cb-79a3-400d-9f17-13dc4a657083.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"inspireThemes":[{"theme":"Land Cover","uri":"http://inspire.ec.europa.eu/theme/lc"}],"keywordsOther":[{"value":"aerial photograph","uri":"http://www.eionet.europa.eu/gemet/concept/135"},{"value":"sand dune","uri":"http://www.eionet.europa.eu/gemet/concept/7420"}],"keywordsTheme":[{"value":"Coastal Dunes"},{"value":"Remote Sensing"},{"value":"Image Classification"}],"licences":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}],"lineage":"The data was originally collected to test the accuracy and repeatability of bare sand and vegetation cover in dunes mapped from aerial imagery.\n\nCollection method: RGB aerial imagery was collected using a DJI Mavic Pro 2 uncrewed aerial vehicle (UAV). The flight was planned with Pix4DCapture based on a ground pixel resolution of 0.01 m. Lateral and longitudinal overlap was set to 80%. Prior to flying, eight (5.8 per 100 photos) Ground Control Points (GCPs) were evenly distributed throughout the dune and their location was surveyed using a Trimble R8 differential global positioning system (DGPS). Orthorectification and mosaicking of the aerial imagery collected was performed using Pix4Dmapper utilising a fully automated workflow based on Structure-from-Motion (SFM) digital photogrammetry algorithms\nNature and Units of recorded values: Pixel values for Red, Green, and Blue at 0.01 m resolution.\n\nQuality Control: Pix4Dmapper was used to manually identify the surveyed GCPs within the aerial imagery. By comparing the absolute coordinates of the GCPs surveyed with those for the same location within the resulting orthomosaic, a root mean square error of 0.003 m was calculated in the X, Y and Z directions, respectively, indicating a high degree of relative accuracy.","metadataDate":"2026-06-29T15:40:41","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/ac7071cb-79a3-400d-9f17-13dc4a657083","name":"Download the data","description":"Download a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/ac7071cb-79a3-400d-9f17-13dc4a657083.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"pointsOfContact":[{"honorificPrefix":"Dr","familyName":"Smyth","givenName":"Thomas","organisationName":"University of Huddersfield","role":"pointOfContact","email":"t.ag.smyth@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-1740-762X","address":{"country":"United Kingdom"},"fullName":"Smyth, T.","pointOfContact":"University of Huddersfield"}],"publicationDate":"2022-11-15T00:00:00.000Z","publishers":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/ac7071cb-79a3-400d-9f17-13dc4a657083"},{"code":"10.5285/ac7071cb-79a3-400d-9f17-13dc4a657083","codeSpace":"doi"}],"resourceType":{"value":"dataset"},"responsibleParties":[{"honorificPrefix":"Dr","familyName":"Smyth","givenName":"Thomas","organisationName":"University of Huddersfield","role":"pointOfContact","email":"t.ag.smyth@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-1740-762X","address":{"country":"United Kingdom"},"fullName":"Smyth, T.","pointOfContact":"University of Huddersfield"},{"familyName":"Smyth","givenName":"T.A.G.","organisationName":"University of Huddersfield","role":"author","email":"t.ag.smyth@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-1740-762X","fullName":"Smyth, T.A.G."},{"familyName":"Wilson","givenName":"R.","organisationName":"University of Huddersfield","role":"author","email":"R.Wilson2@hud.ac.uk","nameIdentifier":"https://orcid.org/0000-0001-9063-8021","fullName":"Wilson, R."},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"},{"organisationName":"University of Huddersfield","role":"rightsHolder","email":"t.ag.smyth@hud.ac.uk"},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"}],"rightsHolders":[{"organisationName":"University of Huddersfield","role":"rightsHolder","email":"t.ag.smyth@hud.ac.uk"}],"spatialReferenceSystems":[{"code":"http://www.opengis.net/def/crs/EPSG/0/4326","title":"WGS 84"}],"spatialRepresentationTypes":["grid"],"spatialResolutions":[{"distance":"0.01"}],"temporalExtents":[{"begin":"2020-02-01","end":"2020-02-28"}],"title":"Aerial imagery of Ynyslas coastal sand dunes, Wales in 2020","topicCategories":[{"value":"imageryBaseMapsEarthCover","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/imageryBaseMapsEarthCover"}],"type":"dataset","uri":"https://catalogue.ceh.ac.uk/id/ac7071cb-79a3-400d-9f17-13dc4a657083","useConstraints":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}]}