56be2d24-16cd-44ca-8f0c-5416dc38214d eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2025-05-03 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Aerial surveys and annotated counts of black-browed and grey-headed albatrosses in their colonies across South Georgia during the 2023/2024 season 2025-05-03 creation 2025-05-03 revision 2025-05-03 publication 2025-05-03 released 1.0 https://doi.org/10.5285/56be2d24-16cd-44ca-8f0c-5416dc38214d doi GB/NERC/BAS/PDC/02055 https://data.bas.ac.uk/ Please cite this item as: Manthorpe, S.J., Mackley, E., & Phillips, R.A. (2025). Aerial surveys and annotated counts of black-browed and grey-headed albatrosses in their colonies across South Georgia during the 2023/2024 season (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/56be2d24-16cd-44ca-8f0c-5416dc38214d This dataset comprises aerial surveys using remotely piloted aerial systems (RPAS) and derived annotations of albatrosses in colonies across South Georgia during the 2023/2024 season (austral summer). The dataset includes stitched orthomosaics and digital surface models (DSM), as well as annotated counts of black-browed and grey-headed albatrosses during their breeding season. Counts are assigned to respective colonies within larger sites. Surveys were conducted as part of an all-island albatross survey carried out every 10 years to monitor albatross trends across South Georgia. Flights were conducted by personnel at BAS and supported by the MV SG Pharos. This project was funded by the following: Friends of South Georgia Island, South Georgia Heritage Trust, Antarctic Research Trust, Peter Smith Charitable Trust for Nature, UK Blue Belt Programme. No credit. completed Manthorpe, Sarah J British Antarctic Survey Researcher author Mackley, Elizabeth British Antarctic Survey Researcher author Phillips, Richard A British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Biosphere > Ecological Dynamics > Endangered Species EARTH SCIENCE > Biosphere > Ecological Dynamics > Indicator Species EARTH SCIENCE > Biosphere > Ecological Dynamics > Population Dynamics EARTH SCIENCE > Biosphere > Ecological Dynamics > Range Changes EARTH SCIENCE > Biosphere > Zoology theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher RPAS South Georgia black-browed albatross grey-headed albatross monitoring remotely piloted aerial system theme Cape North, South Georgia Antarctica Welcome Islet, South Georgia Antarctica Sheathbill Bay, South Georgia Antarctica Sornt and Bernt, South Georgia Antarctica Sitka Bay, South Georgia Antarctica Cape Buller, South Georgia Antarctica Cape Wilson, South Georgia Antarctica Cape Crewe, South Georgia Antarctica Paryadin peninsula (south), South Georgia Antarctica Paryadin peninsula (north), South Georgia Antarctica Cooper Island, South Georgia Antarctica Bird Island, South Georgia Antarctica place Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply url url crossReference doi doi crossReference textTable eng utf8 biota -38.0779 -35.7783 -54.8234 -53.9372 2023-11-21 2023-11-30 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor image/jpeg image/tiff text/csv text/plain application/vnd.shp bytes 83751862272 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=56be2d24-16cd-44ca-8f0c-5416dc38214d WWW:LINK-1.0-http--link Get Data Download data download bytes 83751862272 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=56be2d24-16cd-44ca-8f0c-5416dc38214d WWW:LINK-1.0-http--link Get Data Download data download bytes 83751862272 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=56be2d24-16cd-44ca-8f0c-5416dc38214d WWW:LINK-1.0-http--link Get Data Download data download bytes 83751862272 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=56be2d24-16cd-44ca-8f0c-5416dc38214d WWW:LINK-1.0-http--link Get Data Download data download bytes 83751862272 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=56be2d24-16cd-44ca-8f0c-5416dc38214d WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Surveys: Aerial surveys were carried out using a Mavic Pro from either the MV Pharos or a rigid inflatable boat (RIB), depending on the weather, between the hours of 06:00 and 20:00 local time, from 2023-11-21 to 2023-11-30. Surveys on the MV SG Pharos were conducted from the helipad and were deployed and retrieved by hand, with one pilot and one observer. Surveys from the RIB were undertaken with a pilot and observer and were deployed and retrieved by hand. Survey comprised overlapped imagery of target area, with an aim of over 70% overlap and a minimum target altitude at >60m AGL (above ground level). Flights were completed under conditions conducive to UAV specifications. Flights were not pre-programmed. All flights were carried out under South Georgia Regulated Activity Permit number 2023/036. Stitching: Images were stitched using Structure-from-Motion (SfM) photogrammetry in Pix4D, where a dense point cloud was extracted and transformed into a DSM (in metres), and then resampled onto a map projection (removing camera perspective and terrain distortions) via orthorectification to create a mosaic. The average ground sampling distance was between 1.94-3.4 cm. Pix4D stitching reports are included in the dataset. Annotation: Orthomosaics were annotated for adult albatrosses using QGIS and ArcGIS Pro. All adults were counted, regardless of whether they were on a nest or a non-breeder, using the point tool for vector layers. Birds were distinguished to species level when possible (black-browed albatross: BBA, grey-headed albatross: GHA) and assigned to colony by oblique imagery outlines from previous surveys, which is included in the attribute table. Data collection: Instrumentation used: Mavic Pro, Pix4D, QGIS, ArcGIS Data quality: Coordinate reference system for ouputs: Projection: UTM Zone 24S Horizontal datum: WGS84 Vertical datum: MSL (mean sea level) For some images, elevation was not retrievable from image metadata and was thus derived from flight logs directly. Flight logs were aligned with images by timestamp to retrieve elevation and then manually inputted into Pix4D for stitching. These are included as additional .csv files. Where colony or flight is null, either the image was not used for stitching or the flight column in the flight log was missing/erroneous and was not used. For Paryadin South, elevation was not retrievable from the flight logs either, and thus a second subset of the imagery was used, without colonies that were missing elevation values, to derive data without missing values to conduct further analyses. Some orthomosaics may have some distortion and blurriness, obscuring albatrosses and species-level distinctions in birds. Some metadata (weather conditions) were not recorded and are thus not included in the UAV flight metadata. asNeeded completed