Abstract
This dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.
This is Version 1 of the Australian Soil Clay product of the Soil and Landscape Grid of Australia.
The Soil and Landscape Grid of Australia has produced a range of digital soil attribute products. Each product contains six digital soil attribute maps, and their upper and lower confidence limits, representing the soil attribute at six depths: 0-5cm, 5-15cm, 15-30cm, 30-60cm, 60-100cm and 100-200cm. These depths are consistent with the specifications of the GlobalSoilMap.net project (http://www.globalsoilmap.net/). The digital soil attribute maps are in raster format at a resolution of 3 arc sec (approximately 90 x 90 m pixels).
These maps are generated by combining the best available Digital Soil Mapping (DSM) products available across Australia.
Attribute Definition: 2 micrometre mass fraction of the less than 2 mm soil material determined using the pipette method;
Units: %;
Period (temporal coverage; approximately): 1950-2013;
Spatial resolution: 3 arc seconds (approx 90m);
Total number of gridded maps for this attribute: 18;
Number of pixels with coverage per layer: 2007M (49200 x 40800);
Total size before compression: about 8GB;
Total size after compression: about 4GB;
Data license : Creative Commons Attribution 3.0 (CC By);
Target data standard: GlobalSoilMap specifications;
Format: GeoTIFF.
Dataset History
The National Digital Soil Property Maps are generated by combining the best available digital soil mapping to calculate a variance weighted mean for each pixel. Two DSM methods have been utilised across and in various parts of Australia, these being:
1) Decision trees with piecewise linear models with kriging of residuals developed from soil site data
across Australia. (Viscarra Rossel et al., 2014a);
2) Disaggregation of existing polygon soil mapping using DSMART (Odgers et al. 2014a).
Version 1 of the National Digital Soil Property Maps combines mapping from the:
1) Australia-wide three-dimensional Digital Soil Property Maps;
2) Western Australia Polygon Disaggregation Maps;
3) South Australian Agricultural Areas Polygon Disaggregation Maps;
4) Tasmanian State-wide DSM Maps.
These individual mapping products are also available in the CSIRO Data Access Portal
(https://data.csiro.au). Please refer to these individual products for more detail on the DSM methods
used.
References:
Specifications: Version 1 GlobalSoilMap.net products, Release 2.1, viewed 12/09/2014,
http://www.globalsoilmap.net/specifications.
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Clifford, D, Dobbie, MJ & Searle, R 2014, 'Non-parametric imputation of properties for soil profiles with
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Clifford, D, Searle, R & Holmes, KW 2015, 'Methods to merge disparate spatial estimates of soil
attributes', Soil Research, in preparation.
de Caritat, P & Cooper, M 2011, National Geochemical Survey of Australia: The Geochemical Atlas of
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DEWRN 2014, Mapping soil and land, Department of Environment, Water and Natural Resources, Government of
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rasters from legacy soil maps and from point data', Geoderma, vol. 232, pp. 34-44.
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Information System (ASRIS) Technical Specifications, Revised Version 1.6, June 2012, The Australian
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Odgers, NP, Holmes, KW, Griffin, T & Liddicoat, C 2015a, 'Derivation of soil attribute estimations from
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using soil class probability rasters', Geoderma, vol. 237-238, pp. 190-8.
http://dx.doi.org/10.1016/j.geoderma.2014.09.009.
Odgers, NP, Sun, W, McBratney, AB, Minasny, B & Clifford, D 2014, 'Disaggregating and harmonising soil map
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http://dx.doi.org/10.1016/j.geoderma.2013.09.024.
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Western Australia, 4th ed. Resource Management Technical Report 280, Department of Agriculture and Food
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of methodology and outputs, Resource Management Technical Report 280, Department of Agriculture,
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Viscarra Rossel, RA, Chen, C, Grundy, M, Searle, R, Clifford, D & Campbell, PH 2015a, 'The Australian
three-dimensional soil grid: Australia's contribution to the GlobalSoilMap project', Soil Research, in
preparation.
Viscarra Rossel, RA, Chen, H & Hicks, W 2015b, 'Prediction of spatial distribution of soil attributes to
depth from Australian site and covariate data', Soil Research, in preparation.
Viscarra Rossel, RA & Webster, R 2012, 'Predicting soil properties from the Australian soil visible-near
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Dataset Citation
CSIRO (2014) Soil and Landscape Grid National Soil Attribute Maps - Clay 3 resolution - Release 1. Bioregional Assessment Source Dataset. Viewed 12 March 2019, http://data.bioregionalassessments.gov.au/dataset/f8640540-4bb7-42ee-995a-219881e67705.