PhotoMOB: Automated GIS method for estimation of fractional grain dynamics in gravel bed rivers

PhotoMOB is a GIS toolbox automating the tasks to perform a spatial-temporal quantification of grain size distribution, bed stability and fractional mobility from photos of gravel bed river after hydrological events. Grain are classified as identical (i.e., stationary) or different (i.e., mobile/turned out). The grain size distributions from the photos can be extracted in the form Area-by-Number or Grid-by-Number and are compatible with measurements obtained via other methods as pebble-count. This folder contains data related to both papers in following subfolders: 1_PhotoMOB_part1_Data: data used for error assessment of grains characterisation Grain dataset collected in the field (1_Real),with measurement of the axes (a, b and c) measured using the Pebble-Box, measurement of the weight, estimation of the position of the grains on the surface of the bed. Grain dataset digitised manually and identified automatically by the supervised and automated PhotoMOB procedures as well as for Basegrain free stand-alone tool from Detert and Weitbrecht (2013) and Sedimetrics Digital Gravelometer from Graham (2005a, 2005b). 2_PhotoMOB_part2_Data: data used for error assessment of grain dynamics 3_Example_Data_ready_to_PhotoMOB_Extractor_App: This corresponds to a dataset of 3 hydrological events processed by the PhotoMOB GIS protocol (Part 1 +Part 2). These data are available as an example to be used in the PhotoMOB Extractor application (https://shiny.fannyville.com/photomob_extractor/) to obtain an overview of the output available from these data.

PhotoMOB是一款地理信息系统（GIS）工具箱，可自动化完成水文事件后砾石床河道照片的粒度分布时空定量、河床稳定性及组分活动性分析任务。研究中将颗粒分为未发生变化（即静止）与发生变化（即发生运动或翻转）两类。从照片中提取的粒度分布可采用面积-数量分布（Area-by-Number）或网格-数量分布（Grid-by-Number）形式输出，且可与砾石计数法（pebble-count）等其他测量方法的结果兼容。
本文件夹包含与两篇相关论文对应的数据，按以下子文件夹存储：
1. PhotoMOB_part1_Data：用于颗粒特征识别误差评估的数据集。包含野外采集的颗粒数据集（1_Real），其中记录了使用砾石盒（Pebble-Box）测量的三轴（a、b、c轴）尺寸、颗粒重量，以及颗粒在河床表面的位置估算值；同时包含经人工数字化、通过监督式与自动化PhotoMOB流程自动识别的颗粒数据集，以及使用Detert与Weitbrecht（2013）提出的Basegrain免费独立工具、Graham（2005a、2005b）提出的Sedimetrics数字砾石粒度仪（Sedimetrics Digital Gravelometer）处理得到的颗粒数据集。
2. PhotoMOB_part2_Data：用于颗粒运动动力学误差评估的数据集。
3. Example_Data_ready_to_PhotoMOB_Extractor_App：该数据集包含经PhotoMOB GIS流程（第一部分+第二部分）处理的3次水文事件数据。这些数据可作为示例在PhotoMOB Extractor应用（https://shiny.fannyville.com/photomob_extractor/）中使用，以概览该工具可从这类数据中生成的各类输出结果。