Digital soil maps for key soil properties over New South Wales, version 2.0

Digital soil maps (DSMs) are prepared through quantitative modelling techniques that are based on relationships between soil attributes and the environment. DSMs are presented over NSW for a range of key soil properties, including soil organic carbon (SOC), pH, cation exchange capacity, sum-of-bases, available phosphorous, bulk density, clay, silt and sand (total and fine). The maps are at 100 m spatial resolution and cover ten soil depth intervals down to 2 m, consistent with widely used Australian and international systems. Random Forest decision tree modelling techniques were applied. Validation results for the maps indicate generally moderate to high performance and effectiveness. Maps of mean plus upper 95% and lower 5% prediction limits are available. The maps provide at least a useful first approximation of these soil properties across the State. The products are described more fully in the technical report: Gray (2023), Digital soil mapping of key soil properties over NSW, version 2.0 (76p). The report and raster layers can be downloaded through the NSW environmental data portal SEED ( and are also viewable through the DPE soil and landscape spatial viewer eSPADE ( ). All maps, including prediction limits and intervals, are also available through the DPE data broker.

Data and Resources

Metadata Summary What is metadata?

Field Value
Language English
Edition version 2.0
Purpose For better understanding and management of NSW soils and broader environmental protection
Frequency of change Not planned
Keywords SOIL,SOIL-Chemistry,SOIL-Physics
Field of Research (optional) Land Capability and Soil Degradation
Metadata Date 2022-11-15
Date of Asset Creation 2022-09-01
License Creative Commons Attribution 4.0
Geospatial Topic Geoscientific information
NSW Place Name all NSW

Dataset extent

Temporal Coverage From 1985-01-01 - 2020-12-30
Datum GDA94 Geographic (Lat\Long)
Legal Disclaimer Read
Attribution NSW Department of Climate Change, Energy, the Environment and Water asserts the right to be attributed as author of the original material in the following manner: "© State Government of NSW and NSW Department of Climate Change, Energy, the Environment and Water 2024"