Orthophoto & DEM from drone images, UAV, Aldabra arm01, Seychelles - 20221020 - 02_2

"This dataset presents the results of the photogrammetry process using images collected by an Unmanned Aerial Vehicle in Aldabra arm01, Seychelles, on 20221020

The processing was carried out with the OpenDroneMap software from the raw images provided in the first version of this DOI.
Underwater or aerial images collected by scientists or citizens can have a wide variety of uses for science, ecosystems management, or conservation. These images can be annotated and shared to train IA models which can in turn predict the objects on such images. We provide a set of tools (hardware and software) to collect marine data, predict species or habitat, and provide maps.

The parameters of the OpenDroneMap software are shared so that the proposed processes can be reproduced or improved:
[
{
'name': 'orthophoto-resolution',
'value': 1
},
{
'name': 'auto-boundary',
'value': true
},
{
'name': 'dem-resolution',
'value': '2.0'
},
{
'name': 'dsm',
'value': true
}
]

The depot consists of the following elements:
- 00_: Image preview panel
- DCIM.zip: RAW images from UAV
- GPS.zip: GIS file (Geopackage) containing the overflight area as well as the geolocation of the images accompanied by their thumbnails in the base64 attribute table.
- METADATA.zip: Exif metadata in CSV format, OGC metadata in ISO19115 / 39 XML format, flight reports with thumbnails of drone images and flight statistics (html or pdf files),
- PROCESSED_DATA.zip: Orthophoto, DEM, point cloud, ...

Original tree structure:
│ └─ 20221020_SYC-aldabra-arm01_UAV-02_2
│-------- └─ DCIM
│-------- └─ GPS
│-------- └─ METADATA
│-------- └─ PROCESSED_DATA

Flight survey information:
- Camera model and parameters:
Make: Hasselblad
Model: L1D-20c
Width: 5472
Height: 3648
Focal: 28
WhiteBalance: Manual
ExposureMode: Auto Exposure
ColoSpace: sRGB
EV: -0.7
MeteringMode: CenterWeightedAverage
Camera Pitch: -75.00

- Survey informations:
No Images: 266
Median height: 70 meters
Survey area: 9.92 hectares
Survey from: 2022:10:20 09:50:29 to: 2022:10:20 10:04:39
"