Murray Global Intertidal Change QA Pixel Count

Dataset Availability
1984-01-01T00:00:00Z - 2017-01-01T00:00:00
Dataset Provider
Earth Engine Snippet
coastal google intertidal landsat-derived murray tidal-flats uq


The Murray Global Intertidal Change 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.

The classification was implemented along the entire global coastline between 60° North and 60° South from 1 January 1984 to 31 December 2016. The image collection consists consists of a time-series of 11 global maps of tidal flats at 30m pixel resolution for set time-periods (1984−1986; 1987−1989; 1990−1992; 1993−1995; 1996−1998; 1999−2001; 2002−2004; 2005−2007; 2008−2010; 2011−2013; 2014−2016)

The number of Landsat images used to develop the Landsat covariate layers in each time step of the tidal flat classification. Each image in the image collection refers to a single time step.


30 meters


Name Units Min Max Description
pixel_count count 0 400

Input image count.

Terms of Use

Terms of Use

This work is licensed under a Creative Commons Attribution 4.0 International License.

Any use of the intertidal data must include proper acknowledgement, including citing the associated journal article.


  • Murray, N.J., Phinn, S.R., DeWitt, M., Ferrari, R., Johnston, R., Lyons, M.B., Clinton, N., Thau, D. & Fuller, R.A. (2019) The global distribution and trajectory of tidal flats. Nature, 565, 222-225.


Explore in Earth Engine

var dataset = ee.ImageCollection('UQ/murray/Intertidal/v1_1/qa_pixel_count');

var visualization = {
  bands: ['pixel_count'],
  min: 0.0,
  max: 300.0,
  palette: ['000000', 'FFFFFF']

Map.setCenter(126.6339, 37.4394, 10);

Map.addLayer(dataset, visualization, 'QA Pixel Count');