ASRIS Technical Specifications V1.6

Appendix 2: Updates to the Technical SpecificationsVersion 1.4 March 2005• Substantial change to the definition and variables used to characterize Levels 1 to 3. Climatevariables are now used as descriptors of land-unit tracts rather than defining variables for boundaryplacement (primarily Table 3 Section 4.2, and Sections 6–8). Regolith characterization as beenrefined and summaries of soil taxonomic units added.• Removal of reference to a correction factor for coarse fragments and plant available watercapacity. Replacement with a method relying on the percentage of coarse fragments and theirporosity (page 48). Addition of porosity of coarse fragments as a variable (Table 4, page 41).• Change in formatted length of the variable feature_id• Coverages of spatial data are recommended to conform to the vector baseline GEODATA COAST100K 2004 rather than the earlier 1992 version.Version 1.5 October 2005• Corrections to the spatial uncertainties listed for texture in Table 4• Listing of tables of attributes for Levels 1–3• Clarification of control sections when O horizons are present• Clarification of control section intent for Layer-4 texture• New database schema and related changes to table descriptions.Future consideration• Addition of two fields to Table 49 – SDL10 for fluvio-lacustrine and estuarine, and INF00 forferricrete.Version 1.6 June 2012• The Physiographic Regions of Australia (provinces and regions) are used for ASRIS Level 1 and 2• The ASRIS hiatus has been moved to be between Level 2 and Level 3• ASRIS Level 3 is to be provided by the jurisdictions and normally aggregated from Level 4–5 surveys.• Uncertainty estimates for organic carbon have been modified to distinguish between surface (Oand A1) horizons and deeper horizons (all others).• Erroneous texture-grade codes have been removed from table 24 (i.e. medium sand – MS)• Pedotransfer function added as a bulk density estimation method• ASRIS database table definitions have been updated (tables Table 53 –Table 68)• References have been updated.80