fb560068-04ae-4afb-bbd1-86a1e0003474 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 2025-01-27 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 survey of St Andrews Bay, South Georgia, elephant seal colony during the 2024/2025 season, flight DLPUS_214_17 2025-01-27 creation 2025-01-27 revision 2025-01-27 publication 2025-01-27 released 1.0 https://doi.org/10.5285/fb560068-04ae-4afb-bbd1-86a1e0003474 doi GB/NERC/BAS/PDC/01988 https://data.bas.ac.uk/ Please cite this item as: Fenney, N., Coleman, J., & Bamford, C. (2025). Aerial survey of St Andrews Bay, South Georgia, elephant seal colony during the 2023/24 season, flight DLPUS_214_17 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/fb560068-04ae-4afb-bbd1-86a1e0003474 Aerial survey of St Andrews Bay elephant seal colony, Mirounga leonina, during the 2023/24 season conducted using a remotely piloted aerial system (RPAS). The aerial survey was conducted as part of the Darwin Plus (DPLUS) 214 project: Southwest Atlantic Elephant Seal Population Assessment (SAESPA). Dataset includes the original images and log files, the original RINEX GNSS (global navigation satellite system) base station files, the post-processed global navigation satellite system and imagery data, along with the resulting georeferenced DSM (digital surface model) and an orthorectified mosaic of the imagery. This dataset is from flight number DPLUS_214_17 which was carried out on 2024-10-22. This work was supported by the Overseas Territories Environment and Climate Fund under Grant Darwin Plus ref: DPLUS214: Southwest Atlantic Elephant Seal Population Assessment (SAESPA). No credit. completed Fenney, Nathan British Antarctic Survey Researcher author Coleman, Jamie British Antarctic Survey Researcher author Bamford, Connor 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 > Animal Taxonomy > Mammals EARTH SCIENCE > Biosphere > Ecological Dynamics > Biodiversity EARTH SCIENCE > Biosphere > Ecological Dynamics > Population Dynamics EARTH SCIENCE > Oceans > Marine Biology > Marine Mammals EARTH SCIENCE > Biosphere > Terrestrial Ecosystems 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 South Georgia aerial survey digital surface model drone elephant seal orthorectified mosaic theme St Andrews Bay, South Georgia Antarctica place Habitats and biotopes Oceanographic geographical features theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions public access limited according to Article 13(1)(e) of the INSPIRE Directive license Open Government Licence v3.0 otherRestrictions Data supplied under Open Government Licence v3.0 otherRestrictions Data under embargo until 2026-06-31. url url crossReference textTable eng utf8 biota -36.20312 -36.1537 -54.45722 -54.42987 2024-10-22 2024-10-22 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/plain application/pdf text/csv bytes 12670153523 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fb560068-04ae-4afb-bbd1-86a1e0003474 WWW:LINK-1.0-http--link Get Data Download data download bytes 12670153523 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fb560068-04ae-4afb-bbd1-86a1e0003474 WWW:LINK-1.0-http--link Get Data Download data download bytes 12670153523 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fb560068-04ae-4afb-bbd1-86a1e0003474 WWW:LINK-1.0-http--link Get Data Download data download bytes 12670153523 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fb560068-04ae-4afb-bbd1-86a1e0003474 WWW:LINK-1.0-http--link Get Data Download data download bytes 12670153523 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fb560068-04ae-4afb-bbd1-86a1e0003474 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Data collection: Aerial survey conducted using a RPAS (AgEagle eBee X). The survey consisted of collecting overlapping imagery of the target area, with a forward overlap of 95%. The target altitude during acquisition was 95 m AGL (above ground level). During the aerial surveys a geodetic Trimble GNSS base station receiver collected data. Post flight processing: Precise point positioning (PPP) was undertaken using the online Canadian Spatial Reference System PPP tool to generate the position of the base station during the survey and which was then used to process the eBee X's onboard GNSS receiver using post-processed kinematic (PPK) processing to improve the accuracy of the camera centres captured during flight. Photogrammetry / final outputs: Structure from motion photogrammetry was used to determine the exterior orientation (x, y, z, omega, phi and kappa (or roll, pitch, yaw)) of the camera during image acquisition using a combination of the onboard GNSS solution and common points within the images. Once the camera centre and orientation for each image was determined, a dense point cloud was extracted of the surface within the target area. The dense point cloud was then transformed into a DSM (in metres), which in turn was used to resample the images onto a map projection, removing camera perspective and terrain distortions, in a process called ortho-rectification and resulted in a single complete mosaic of the imagery. Data collection: Data collection equipment: Unmanned aerial vehicle (UAV): Manufacturer: AgEagle Model: eBee X Sensor: AgEagle SODA 3D Flight management software: eMotion (version 3.23.0) GNSS base station: Manufacturer: Trimble Receiver model: R9s Antenna model: Zyphr Model 2 Post-flight processing software: Canadian Spatial Reference System Precise Point Positioning (CSRS-PPP, Version 3) eMotion (version 3.23.0) Photogrammetry software: Pix4D (version 4.9.0.). Data quality: Coordinate reference system for outputs: Projection: UTM Zone 23S Horizontal datum: WGS84 Vertical datum: MSL (mean sea level), EGM2008 geoid Resolution of final outputs: DSM (2.1 cm) Orthorectified mosaic (2.1 cm) The camera is placed in the centre of the central component of the drone, with the LiDAR ground sensor immediately below it and offset from the camera. The GNSS antenna is at the front of the drone, offset in the opposite direction. The sampling rate varied throughout the flight, depending on the speed of the platform. Calibration was accounted for in processing. asNeeded completed