Orthophoto & DEM from drone images, UAV, Aldabra passe dubois 40m, Seychelles - 20221024 - 02_26

"This dataset presents the results of the photogrammetry process using images collected by an Unmanned Aerial Vehicle in Aldabra passe dubois 40m, Seychelles, on 20221024 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: │ └─ 20221024_SYC-aldabra-passe-dubois-40m_UAV-02_26 │-------- └─ 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: -90.00 - Survey informations: No Images: 407 Median height: 70 meters Survey area: 9.97 hectares Survey from: 2022:10:24 10:06:15 to: 2022:10:24 10:23:20 "本数据集收录了2022年10月24日于塞舌尔群岛阿尔达布拉杜波依斯水道40米海域，由无人机（Unmanned Aerial Vehicle，UAV）采集的影像经摄影测量处理后得到的成果。 本次处理基于本DOI首个版本提供的原始影像，采用OpenDroneMap软件完成。 由科研人员或公众采集的水下、航空影像可广泛应用于科学研究、生态系统管理与物种保护领域。此类影像可经标注后共享，用于训练人工智能（Artificial Intelligence，AI）模型以实现影像目标识别。本数据集配套提供一套包含硬件与软件的工具集，可用于海洋数据采集、物种/生境预测及地图生成。 本次处理所用的OpenDroneMap软件参数已公开，以便相关处理流程可被复现或优化： [ { "name": "正射影像分辨率", "value": 1 }, { "name": "自动边界生成", "value": true }, { "name": "数字高程模型（Digital Elevation Model，DEM）分辨率", "value": "2.0" }, { "name": "生成数字表面模型（Digital Surface Model，DSM）", "value": true } ] 本数据集存储包包含以下组成部分： - 00_：影像预览面板 - DCIM.zip：无人机采集的原始影像文件包 - GPS.zip：地理信息系统（Geographic Information System，GIS）地理数据包（Geopackage），包含飞行覆盖区域、影像地理定位信息，且属性表中以base64格式存储影像缩略图 - METADATA.zip：包含CSV格式的EXIF（Exchangeable Image File Format）元数据、符合ISO 19115/39标准的OGC（Open Geospatial Consortium）元数据，以及搭载无人机影像缩略图与飞行统计数据的飞行报告（HTML或PDF格式） - PROCESSED_DATA.zip：正射影像、数字高程模型、点云等处理后成果文件包 原始文件目录结构： └── 20221024_SYC-aldabra-passe-dubois-40m_UAV-02_26 ├── DCIM ├── GPS ├── METADATA └── PROCESSED_DATA 飞行测绘信息： ### 相机型号与参数： - 制造商：哈苏（Hasselblad） - 型号：L1D-20c - 图像宽度：5472像素 - 图像高度：3648像素 - 焦距：28mm - 白平衡模式：手动 - 曝光模式：自动曝光 - 色彩空间：sRGB - 曝光补偿：-0.7 - 测光模式：中央重点加权平均测光 - 相机俯仰角：-90.00° ### 测绘作业信息： - 影像总数：407张 - 飞行中位高度：70米 - 测绘面积：9.97公顷 - 作业时段：2022年10月24日10:06:15 至 2022年10月24日10:23:20