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Enhanced Bare Earth Covariates for Soil and Lithological Modelling

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Created 20/10/2024

Updated 21/01/2025

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This dataset consists of bare earth covariates designed to indicate the presence of iron oxides, ferrous minerals, quartz/carbonate and hydroxyl minerals, to support soil and lithological modelling across Australia. Bare earth layers (bands) represent the weighted geometric median of pixel values derived from a 30 year time-series of Landsat 5, 7 and 8 imagery converted to at-surface-reflectance, using the latest techniques to reduce the influence of vegetation (see Publications: Roberts, Wilford & Ghattas 2019). Bare earth layers are (BLUE (0.452 - 0.512), GREEN (0.533 - 0.590), RED, (0.636 - 0.673) NIR (0.851 - 0.879), SWIR1 (1.566 - 1.651) and SWIR2 (2.107 - 2.294) wavelength regions. Covariates are then derived from principal components analysis and ratios of specific bare earth layers to target identification of elements of surface geochemistry. Layers are available as mosaics or tiles in 30 or 90 metre resolution.

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Title Enhanced Bare Earth Covariates for Soil and Lithological Modelling
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/32c92f55-9cca-4931-b61b-bd4624a42e72
Contact Point
Environment Protection Authority (EPA) Victoria
john.wilford@ga.gov.au
Reference Period 16/03/1983 - 30/06/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au