Murray Global Intertidal Change Classification v1.1 (1984-2016)

This dataset contains global maps of tidal flat ecosystems produced via a supervised classification of 707,528 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707,528幅陆地卫星（Landsat）档案影像开展监督分类所生成的全球潮滩生态系统分布图。每一个像素均参照全球分布的训练数据集，被划分为潮滩、永久性水体或其他三类。该产品刻画了全球海岸线周边的潮滩生态系统分布情况。分析中被归类为潮滩的像素涵盖多种潮滩生态系统类型，包括未固结细颗粒沉积物（潮泥滩）、未固结粗颗粒沉积物（潮滩沙地），以及固结沉积物、有机物质或岩石（宽阔潮间带岩滩）；同时排除了以植被为优势类群的潮间带生态系统所对应的光谱特征，例如红树林与植被沼泽。本分析旨在识别受周期性潮汐淹没的像素，因此也可能包含潮间带动态特征可被观测到的其他潮间带系统。