Uncrewed Aircraft System (UAS) RGB and Multispectral Imagery Data - Calperum Mallee Site, 2022

This dataset contains RGB and multispectral imagery collected at TERN’s Calperum Mallee SuperSite during a field trial of an Uncrewed Aircraft System (UAS), conducted to assess the use of drone-based imagery for the TERN Drone project across existing and future TERN sites (AusPlots, SuperSites, and Cal/Val sites). Standardised TERN Ecosystem Surveillance Drone Data Collection and Data Processing protocols are used to collect drone imagery and to generate orthomosaics. The protocols developed in 2022 are based on the DJI Matrice 300 (M300) RTK drone platform. DJI Zenmuse P1 and MicaSense RedEdge-MX/Dual sensors are used with M300 to capture RGB and multispectral imagery simultaneously. The data is georeferenced using the DJI D-RTK2 base station and onboard GNSS RTK. In the processing workflow, the multispectral image positions (captured with navigation-grade accuracy) are interpolated using image timestamp and RGB image coordinates. Dense point clouds and the fine-resolution RGB smoothed surface were used to generate co-registered RGB (1 cm/pixel) and multispectral (5 cm/pixel) orthomosaics. Mission-specific metadata for each plot is provided in the imagery/metadata folder. The Drone Data Collection and RGB and Multispectral Imagery Processing protocols can be found at <em> https://www.tern.org.au/field-survey-apps-and-protocols/ </em>.本数据集收录了澳大利亚陆地生态系统研究网络（Terrestrial Ecosystem Research Network, TERN）卡尔佩鲁马利超级站点（Calperum Mallee SuperSite）开展的无人航空器系统（Uncrewed Aircraft System, UAS）野外试验期间采集的RGB与多光谱影像。本次试验旨在评估基于无人机的影像在TERN无人机项目中的应用可行性，覆盖TERN现有及未来站点（包括AusPlots、超级站点及校准验证站点）。 本研究采用标准化的TERN生态监测无人机数据采集与处理规程，完成无人机影像采集与正射影像镶嵌图（orthomosaics）生成。2022年制定的该规程基于DJI大疆经纬Matrice 300（M300）RTK无人机平台开发，该平台搭载DJI禅思Zenmuse P1与MicaSense RedEdge-MX/Dual传感器，可同步采集RGB与多光谱影像。 数据通过DJI D-RTK2基准站与机载全球导航卫星系统实时动态差分（GNSS RTK）技术完成地理配准。在处理流程中，研究人员利用影像时间戳与RGB影像坐标，对导航级精度下采集的多光谱影像位置进行插值处理。本研究通过密集点云与高分辨率RGB平滑表面，生成配准一致的RGB（1厘米/像素）与多光谱（5厘米/像素）正射影像镶嵌图。 每个样地的任务专属元数据均存储于imagery/metadata文件夹中。无人机数据采集及RGB与多光谱影像处理规程可通过以下链接获取：<em> https://www.tern.org.au/field-survey-apps-and-protocols/ </em>。