Date (Creation)

2025-01-27

Date (Revision)

2025-01-27

Date (Publication)

2025-01-27

Date (released)

2025-01-27

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/fb560068-04ae-4afb-bbd1-86a1e0003474

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01988

Codespace

https://data.bas.ac.uk/

Other citation details

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

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Fenney, Nathan		Author
British Antarctic Survey	Coleman, Jamie		Author
British Antarctic Survey	Bamford, Connor		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• 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

• South Georgia

• aerial survey

• digital surface model

• drone

• elephant seal

• orthorectified mosaic

Place

• St Andrews Bay, South Georgia Antarctica

GEMET - INSPIRE themes, version 1.0

• Habitats and biotopes
• Oceanographic geographical features

Access constraints

Other restrictions

Other constraints

public access limited according to Article 13(1)(e) of the INSPIRE Directive

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data under embargo until 2026-06-31.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Biota

Begin date

2024-10-22

End date

2024-10-22

Supplemental Information

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.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

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.

Metadata

File identifier

fb560068-04ae-4afb-bbd1-86a1e0003474 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-01-27

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact