From Terrestrial Ecosystem Research Network
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Maps of Australian soil composition measured with visible-near infrared spectra

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Created 21/01/2025

Updated 21/01/2025

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We measured the spectra of 4606 surface soil samples from across Australia using a vis-NIR spectrometer. These spectra provide an integrative measure that provides information on the fundamental characteristics and composition of the soil, including colour, iron oxide, clay and carbonate mineralogy, organic matter content and composition, the amount of water present and particle size. This soil information content of the spectra was summarised using a principal component analysis (PCA). We used model trees to derive statistical relationships between the scores of the PCA and 31 predictors that were readily available and we thought might best represent the factors of soil formation (climate, organisms, relief, parent material, time and the soil itself). The models were validated and subsequently used to produce digital maps of the information content of the spectra, as summarised by the PCA, with estimates of prediction error at 3-arc seconds (around 90 m) pixel resolution. The maps might be useful in situations requiring high-resolution, quantitative soil information e.g. in agricultural, environmental and ecologic modelling and for soil mapping and classification. Attributes: Units of measurement: 1. Principal component 1; 2. Principal component 3; 3. Principal component 3. For interpretations please see Viscarra Rossel & Chen (2011). Data Type: Float Grid. Map Projection: Geographic. Datum: GDA94. Map units: Decimal degrees. Resolution: 0.00083333333 degrees. File Header Information: ncols 48874; nrows 40373; xllcorner 112.91246795654; yllcorner -43.642475129116; cellsize 0.00083333333333333; NODATA_value -9999; byteorder LSBFIRST.

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Title Maps of Australian soil composition measured with visible-near infrared spectra
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/bc9a75cd-3d7a-4cd7-bb33-efaa58f55d48
Contact Point
Environment Protection Authority (EPA) Victoria
esupport@tern.org.au
Reference Period 11/04/2016
Geospatial Coverage {"type": "Polygon", "coordinates": [[[112.99875, -44.00125], [154.01625, -44.00125], [154.01625, -9.98125], [112.99875, -9.98125], [112.99875, -44.00125]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Maps of Australian soil composition measured with visible-near infrared spectra". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/maps-of-australian-soil-composition-measured-with-visible-near-infrared-spectra

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