Unprocessed aerial imagery from 19 April 2020 coastal survey of Central California.

This is a set of 2889 oblique aerial photogrammetric images and their derivatives, collected from San Francisco to Monterey with a fixed-lens digital camera from a crewed light aircraft, for processing using structure-from-motion photogrammetry and machine learning to study coastal geomorphic processes at high temporal and spatial resolution. JPG files in each folder follow the following naming convention: {CAM###}_{YYYYMMDDHHMMSS_ss}.jpg, where {CAM###} is the last 3 digits of the camera serial number, preceded by the letters "cam", and where {YYYYMMDDHHMMSS_ss} is the image acquisition time in {YearMonthDayHourMinuteSecond_hundredths} expressed in 24-hour time, as recorded by the camera's internal clock and written to the SubSecondDateTime field in the image EXIF data (for example CAM001_202009182311_50 would be the timestamp for an image with a SubSecondDateTime EXIF time/date stamp of September 18th, 2020 at 11:11.50 pm.

本数据集包含2889张倾斜航空摄影测量影像及其衍生数据，采集范围覆盖旧金山至蒙特雷区间，由搭载固定镜头数码相机的载人轻型航空器完成采集，旨在通过运动恢复结构（Structure-from-Motion，SfM）摄影测量与机器学习算法开展处理，以高时空分辨率研究海岸地貌过程。各文件夹内的JPG文件遵循如下命名规范：{CAM###}_{YYYYMMDDHHMMSS_ss}.jpg，其中{CAM###}为相机序列号的最后三位，前缀为字母串"cam"；{YYYYMMDDHHMMSS_ss}代表图像采集时间，采用24小时制的年、月、日、时、分、百分秒格式，该时间由相机内置时钟记录，并写入图像可交换图像文件格式（Exchangeable Image File Format，EXIF）数据的SubSecondDateTime字段。例如，CAM001_202009182311_50对应的影像，其EXIF的SubSecondDateTime字段时间为2020年9月18日23时11分11.50秒。