f3f476bb-caf6-4341-8504-3827622bfc3b 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 2024-10-01 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 the Bjornstadt Bay, South Georgia, gentoo penguin colony during the 2021/22 season, flight number DPLUS_109_09 2024-10-01 creation 2024-10-01 revision 2024-10-01 publication 2024-10-01 released 1.0 https://doi.org/10.5285/f3f476bb-caf6-4341-8504-3827622bfc3b doi GB/NERC/BAS/PDC/01890 https://data.bas.ac.uk/ Please cite this item as: Fenney, N., Hollyman, P., Coleman, J., Fox, A., Trathan, P., & Collins, M. (2024). Aerial survey of the Bjornstadt Bay, South Georgia, gentoo penguin colony during the 2021/22 season, flight number DPLUS_109_09 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/f3f476bb-caf6-4341-8504-3827622bfc3b Aerial survey of the Bjornstadt Bay gentoo penguin colony during the 2021/22 season conducted using a RPAS (remotely piloted aerial system). The aerial survey was conducted as part of the Darwin Plus (DPLUS) 109 project: Initiating Monitoring Support for the SGSSI-MPA Research and Monitoring Plan for the purpose of establishing a baseline population estimate of key indicator species around South Georgia. Dataset includes the original images and log files, the original RINEX GNSS (global navigation satellite system) base station files, the post-processed GNSS 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_109_09 and was carried out on 04/12/2021. This work was supported by the Overseas Territories Environment and Climate Fund under Grant Darwin Plus ref: DPLUS109: Initiating monitoring support for the SGSSI-MPA Research and Monitoring Plan. Funding for this work was also received from the UK Blue Belt fund through GSGSSI. No credit. completed Hollyman, Philip British Antarctic Survey Researcher author Fenney, Nathan British Antarctic Survey Researcher author Coleman, Jamie British Antarctic Survey Researcher author Fox, Adrian British Antarctic Survey Researcher author Trathan, Philip British Antarctic Survey Researcher author Collins, Martin 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 > Oceans > Marine Biology > Marine Mammals 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 Aerial Survey Digital Surface Model Drone Gentoo Penguin Orthorectified Mosaic South Georgia theme Bjornstadt Bay South Georgia Island place 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 publication. url url crossReference url url largerWorkCitation textTable eng utf8 imageryBaseMapsEarthCover -35.93554 -35.9219 -54.60305 -54.59282 2021-12-04 2021-12-04 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 bytes 1 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=f3f476bb-caf6-4341-8504-3827622bfc3b 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 minimum forward overlap of 80% and a side overlap of 60%. The altitude during acquisition was species specific, determined by the required ground sampling distance (GSD), but was generally between 80 m and 120 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. The PPP solution generated was then used to process the eBee X's onboard GNSS receiver using post-processed kinematic (PPK) processing within eMotion to improve the accuracy of the camera centres captured during flight. Once complete, the coordinates for each image was then updated in the EXIF data and reexported from eMotion as .jpg's. 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 PPK solutions 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, 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. Please refer to Fenney et al. for further information on the data collection and post processing methodologies. Data collection: Data collection equipment: UAV: Manufacturer: AgEagle Model: eBee X Sensor: AgEagle Aeria X (RBG camera) Flight management software: eMotion (version 3.20.0 and version 3.22.0) 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 3.20.0 and version 3.22.0) Photogrammetry software: Agisoft Metashape (version 1.8.4 build 14671) or Pix4D (version 4.7.5.). Data quality: Please refer to Fenney et al. for further information on the data collection and post processing methodologies. PPP processing accuracy is reported in the CSRS PPP processing report (.pdf). PPK processing accuracy (by image) is reported in the eMotion camera centre geoinfo file (.txt). Data resolution Target GSD of aerial survey (1.9 cm). Resolution of final outputs: DSM (4.2 cm) Orthorectified mosaic (2.1 cm) asNeeded completed