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High tide and low tide composites 25m v. 2.0.0

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Created 20/01/2025

Updated 20/01/2025

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The High and Low Tide Composites product is composed of two surface reflectance composite mosaics of Landsat TM and ETM+ (Landsat 5 and Landsat 7 respectively) and OLI (Landsat 8) surface reflectance data (Li et al., 2012). These products have been produced using Digital Earth Australia (DEA). The two mosaics allow cloud free and noise reduced visualisation of the shallow water and inter-tidal coastal regions of Australia, as observed at high and low tide respectively (Sagar et al., 2018). The composites are generated utilising the geomedian approach of Roberts et al (2017) to ensure a valid surface reflectance spectra suitable for uses such as habitat mapping. The time range used for composite generation in each polygon of the mosaic is tailored to ensure dynamic coastal features are captured whilst still allowing a clean and cloud free composite to be generated. The concepts of the Observed Tidal Range (OTR), and Highest and Lowest Observed Tide (HOT, LOT) are discussed and described fully in Sagar et al. (2017) and the product description for the ITEM v 1.0 product (Geoscience Australia, 2016).

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Title High tide and low tide composites 25m v. 2.0.0
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/40d7f595-66b3-42e0-a5df-87efdc117aec
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 16/08/1986 - 31/07/2017
Geospatial Coverage {"type": "Polygon", "coordinates": [[[-1943830.0, -1119030.0], [2170690.0, -1119030.0], [2170690.0, -4856630.0], [-1943830.0, -4856630.0], [-1943830.0, -1119030.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "High tide and low tide composites 25m v. 2.0.0". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/high-tide-and-low-tide-composites-25m-v-2-0-0