Aerial survey of the St Andrews Bay, South Georgia, elephant seal colony during the 2024/25 season, flight DPLUS_214_09
GB/NERC/BAS/PDC/02233
Abstract:
Aerial survey of the St Andrews Bay elephant seal colony during the 2024/25 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 post-processed imagery data, along with the resulting georeferenced DSM (digital surface model) and an orthorectified mosaic of the imagery. Please note, no GNSS base station was used during this survey.
This dataset is from flight number DPLUS_214_09 which was carried out on 17/10/2024.
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).
Citation:
Fenney, N., Coleman, J., & Bamford, C. (2026). Aerial survey of the St Andrews Bay, South Georgia, elephant seal colony during the 2024/25 season, flight DPLUS_214_09 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/75fd6660-bd4f-40ff-a8fb-a4f1f0c8fed2
Access Data
GET DATA:
License
| Access: | No restrictions apply. |
|---|---|
| Use: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
Basic Information
| Creation Date: | 2026-06-30 |
|---|---|
| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
|
| Parameters: |
|
Additional Information
| Quality: | Post-Processed Kinematic (PPK) processing accuracy (by image) is reported in the eMotion camera centre geoinfo file (.txt). Coordinate reference system for outputs: Projection: UTM Zone 23S Horizontal datum: WGS84 Vertical datum: MSL (mean sea level), EGM2008 (geoid) Target Ground Sample Distance (GSD) of aerial survey (2.1 cm). Resolution of final outputs: DSM (2.1 cm) Orthorectified mosaic (2.1 cm) |
|
|---|---|---|
| Lineage/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 80% and a side overlap of 60%. The target altitude during acquisition was 95 m AGL (above ground level). 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. |
|
ASSOCIATED DATA SET(S):
- https://doi.org/10.5285/14b142da-9341-471b-af7a-8613f0fbbb25
- https://doi.org/10.5285/236cbe3a-5f05-4cef-8e92-7145b0190f0b
- https://doi.org/10.5285/2e870dac-9eb1-4f1d-a5ff-fe18090afd79
- https://doi.org/10.5285/463ea06f-6c49-4d6e-a80b-21c88a71c3da
- https://doi.org/10.5285/47d0718d-7146-44d3-965c-60e62a48b8cc
- https://doi.org/10.5285/5224ff55-e347-4d26-9cd5-28c9bb52a805
- https://doi.org/10.5285/6e4a0ad0-8f43-4b8b-bca5-983db79d2627
- https://doi.org/10.5285/6ecb7be8-6b68-44a7-8aac-abbbb591b4e5
- https://doi.org/10.5285/85de16ff-a3b2-42b4-a898-aea94ee47b83
- https://doi.org/10.5285/865373e6-0b33-418e-9b80-9442dccbcd3e
- https://doi.org/10.5285/9c4cb255-a754-4b6b-9748-d8b355e029de
- https://doi.org/10.5285/a0c38c31-694c-4f07-a178-66f219fca5d9
- https://doi.org/10.5285/a0eac296-ccc6-4d25-b749-a96fec66d233
- https://doi.org/10.5285/a6446ddc-d6bf-4267-9af6-599d2fcc2efa
- https://doi.org/10.5285/c2346fb2-7ef0-421c-9511-6ba7701f0f0a
- https://doi.org/10.5285/c8ddb9ad-a710-4cf3-b068-cf1c57ff31ae
- https://doi.org/10.5285/e238f84e-63b2-4019-8308-7398a8ea204f
- https://doi.org/10.5285/f5139bb9-79b2-44e1-963e-c2755ffd1d01
- https://doi.org/10.5285/fb560068-04ae-4afb-bbd1-86a1e0003474
PROJECT HOME PAGE:
Extent
| Temporal Coverage: | |
|---|---|
| Start Date | 2024-10-17 |
| End Date | 2024-10-17 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -54.45722 |
| Northernmost | -54.42988 |
| Longitude | |
| Westernmost | -36.20313 |
| Easternmost | -36.15371 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | South Georgia Island |
| Detailed Location | St Andrews Bay |
Instrumentation
| Data Collection: | Data collection equipment: UAV: Manufacturer: AgEagle Model: eBee X Sensor: AgEagle SODA 3D Flight management software: eMotion (version 3.23.0) Post-flight processing software: eMotion (version 3.23.0) Photogrammetry software: Pix4D (version 4.9.0.). |
|---|
Storage
| Data Storage: | Total size: 15.6 GB Data is archived using the following structure: DPLUS_214_sortie number (e.g. DLPUS_214_01). 01_flight data: imagery. Image files (.jpg). Each file follows the same naming convention. For example, image file IX-12-61425_0070_0001.jpg refers to the platform ID (IX-12-61425), the sortie number (0070), the image number (0001) and the file extension (.jpg). 01_flight data: logs. UAV log files (.bb3). Each file follows the same naming convention. For example, log file IX-12-61425_0070_part001.bb3 refers to the platform ID (IX-12-61425), the sortie number (0070), the part number (part001) and the file extension (.bb3). These files are binary and can be opened in eMotion, by AgEagle / SenseFly. Please note, due to the nature of these files they are not available in open format. 02_post_flight_data: PPK processed image files (.jpg) and PPK processed camera centres (.kml, .txt, .bb3). Each image file follows the same naming convention. For example, image file IX-12-61425_0070_0001_p.jpg refers to the platform ID (IX-12-61425), the sortie number (0070), the image number (0001), the fact the image is processed (_p), and the file extension (.jpg). 03_final_outputs: dsm. Final digital surface model files (.tif, .tfw, .prj). Each file follows the same naming convention. For example, file IX-12-61425_0070_dsm.tif refers to the platform ID (IX-12-61425), the sortie number (0070), data type (dsm) and the file extension (.tif). 03_final_outputs: ortho. Final orthorectified mosaic files (.tif, .tfw, .prj). Each file follows the same naming convention. For example, file IX-12-61425_0070_mosaic.tif refers to the platform ID (IX-12-61425), the sortie number (0070), data type (mosaic) and the file extension (.tif). |
|---|