Aerial imagery of Ynyslas coastal sand dunes, Wales in 2020

The data contains Aerial imagery of Ynyslas Dunes, Wales saved in a GeoTiff format. The imagery covers 8000 m2 of a discrete coastal sand dune at northern distal end of a spit in Dyfi National Nature Reserve. Data was collected during a six-minute flight on 5th February 2020 made by a DJI Mavic Pro 2 uncrewed aerial vehicle (UAV). The flight was planned with Pix4DCapture based on a ground pixel resolution of 0.01 m. Lateral and longitudinal overlap was set to 80%. Prior to flying, eight (5.8 per 100 photos) Ground Control Points (GCPs) were evenly distributed throughout the dune and their location surveyed using a differential global positioning system (DGPS). Orthorectification and mosaicking of the aerial imagery collected was performed using Pix4Dmapper utilising a fully automated workflow based on Structure-from-Motion (SFM) digital photogrammetry algorithms. The data was collected to test the accuracy and repeatability of bare sand and vegetation cover in dunes mapped from aerial imagery. Data was collected and processed by Dr Ryan Wilson (University of Huddersfield) and interpreted by Dr Thomas Smyth (University of Huddersfield). The work was supported by the Natural Environment Research Council NE/T00410X/1. Full details about this dataset can be found at https://doi.org/10.5285/ac7071cb-79a3-400d-9f17-13dc4a657083

本数据集收录了威尔士伊尼斯拉斯沙丘的航空影像，存储格式为GeoTiff。影像覆盖了迪菲国家公园保护区中一条沙嘴的北部末端8000平方米的独立海岸沙丘。数据采集于2020年2月5日，由搭载DJI Mavic Pro 2无人机的飞行任务完成，飞行时长为六分钟。飞行计划基于地面像素分辨率0.01米，采用Pix4DCapture软件制定，横向和纵向重叠率设置为80%。飞行前，在沙丘上均匀分布了八个（每100张照片5.8个）地面控制点（GCPs），并利用差分全球定位系统（DGPS）对其位置进行了测量。航空影像的正射校正和镶嵌工作由Pix4Dmapper软件执行，该软件利用基于结构从运动（SFM）数字摄影测量算法的完全自动化工作流程。收集数据旨在检验从航空影像中绘制出的裸沙和植被覆盖的精度与可重复性。数据采集与处理由哈德斯菲尔德大学Ryan Wilson博士负责，由Thomas Smyth博士（哈德斯菲尔德大学）进行解读。该项目得到自然环境研究委员会（NE/T00410X/1）的支持。关于此数据集的详细信息可在以下链接找到：https://doi.org/10.5285/ac7071cb-79a3-400d-9f17-13dc4a657083