Murray Global Intertidal Change Classification v1.2 (1999-2019)

This dataset contains global maps of tidal flat ecosystems produced via a supervised classification of Landsat Archive images. Each pixel was classified into tidal flat, permanent water or other with reference to a globally distributed set of training data. This product depicts tidal flat ecosystems around the global coastline. Pixels classified as tidal flat in the analysis represent several types of tidal flat ecosystems, including unconsolidated fine-grain sediments (tidal mudflats), unconsolidated coarse-grain sediments (tidal sand flats), and consolidated sediments, organic material or rocks (wide tidal rock-platforms), while excluding spectral signatures indicating the presence of vegetation dominated intertidal ecosystems such as mangroves and vegetated marshes. The analysis aimed to identify pixels that are subject to regular tidal inundation, and therefore may also include other intertidal systems where intertidal dynamics are observable.

本数据集包含通过对Landsat档案影像（Landsat Archive images）进行监督分类得到的潮滩生态系统全球分布图。所有像素均参照一套全球分布的训练数据集，被划分为潮滩、永久水体或其他类别。本产品展示了全球沿海区域的潮滩生态系统分布情况。本分析中被归类为潮滩的像素对应多种潮滩生态系统类型，包括未固结细粒沉积物（潮滩泥滩，tidal mudflats）、未固结粗粒沉积物（潮滩沙滩，tidal sand flats）以及由固结沉积物、有机质或岩石构成的宽阔潮间岩滩（wide tidal rock-platforms）；同时排除了表征以植被为主的潮间带生态系统（如红树林与植被沼泽）存在的光谱特征。本分析旨在识别受周期性潮汐淹没的像素，因此也可能涵盖可观测到潮间带动态变化的其他潮间带系统。

搜集汇总

背景与挑战

背景概述

该数据集是通过Landsat图像监督分类生成的全球潮滩生态系统地图（1999-2019年），分类包括潮滩、永久水域和其他类型，特别排除了植被主导的潮间带生态系统，旨在识别受潮汐定期淹没影响的区域。