祁连山综合观测网：石羊河流域地表过程综合观测网（西营河站物候相机观测数据集-2019）

该数据集包含2019年1月1日至12月31日石羊河流域地表过程综合观测网西营河站的物候相机观测数据，该仪器由北京师范大学自主研发并进行处理。物候相机集成数据获取与数据传输功能。该物候相机采用垂直向下的方式采集数据，拍摄数据分辨率为2592*1944，可指定拍摄时间频率。对于绿度指数物候期计算，需要根据感兴趣区域计算相对绿度指数（GCC, Green Chromatic Coordinate公式为GCC=G/(R+G+B), R、G、B为图像红、绿、蓝三通道像元值），然后进行无效值填充和滤波平滑，最后根据生长曲线拟合确定关键物候期参数，如生长季起始日、顶峰、生长季结束日等；对于覆盖度，首先进行数据预处理，选择光照不太强的图像，然后将图像分割为植被和土壤，计算每张图像的植被像素占计算区域内的比例作为该图像对应的覆盖度，在时间序列数据提取完成以后，再按用户指定的时间窗口对原始覆盖度数据进行平滑滤波，滤波后的结果为最终的时间序列覆盖度。本数据集包括相对绿度指数（Gcc）、物候期及覆盖度（Fc）。This dataset contains phenological camera observation data acquired at the Xiying River Station of the Comprehensive Observation Network for Surface Processes in the Shiyang River Basin, spanning from January 1 to December 31, 2019. The instrument was independently developed and its observed data was processed by Beijing Normal University. The phenological camera integrates both data acquisition and data transmission functionalities. It collects data in a vertically downward orientation, with an image resolution of 2592×1944, and the capture frequency can be customized by users. For the calculation of phenological phases using the greenness index, the relative green chromatic coordinate (GCC, Green Chromatic Coordinate, with the formula GCC=G/(R+G+B), where R, G, and B represent the pixel values of the red, green, and blue channels of the image, respectively) should be first calculated based on the region of interest. Subsequently, invalid value filling and filter smoothing are conducted, and finally key phenological phase parameters such as the start date of the growing season, peak date, and end date of the growing season are determined via growth curve fitting. For vegetation coverage calculation, data preprocessing is performed first by selecting images with moderate lighting conditions. Then, the images are segmented into vegetation and soil regions, and the proportion of vegetation pixels within the calculation area of each image is calculated as the coverage corresponding to that image. After the extraction of time-series data is completed, the original coverage data is smoothed and filtered using the user-specified time window, and the filtered result serves as the final time-series coverage data. This dataset includes relative green chromatic coordinate (Gcc), phenological phases, and vegetation coverage (Fc).

搜集汇总

背景与挑战

背景概述

该数据集是2019年石羊河流域西营河站的物候相机观测数据，包含每日拍摄的高分辨率图像，用于计算相对绿度指数、物候期和植被覆盖度，以监测植被生长季动态。数据具有日时间分辨率和10-100米空间分辨率，适用于地表过程研究和环境变化分析。