ASRIS Technical Specifications V1.6

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8 Level-3 descriptors (land zone)The land units at Level 3 are predominantly groupings of geomorphically related systems. Some may alsoreflect administrative boundaries used by the states. These units differ from Level 2 in both detail andconcept. Level-3 units may have many tracts and conformity of boundaries with Level 2 is not mandatory.Level-3 tracts are normally aggregated from surveys and are below the ASRIS Mapping Hiatus whereasLevels 1–2 are based on subdivisions of the continent. Most descriptors for Level 3 are generated assimplifications, weighted averages and histograms from Level-4 and Level-5 tracts. Additional descriptionsprovide:• Estimates of the resistance to weathering of the substrate• A text description of the tractIn many cases, the number of Level-3 tracts per Level-2 parent will be greater than seven.9 Level-4 descriptors (land district)The land units at Level 4 are normally groupings of geomorphically related systems. (In some states, landsystem or soil-landscape systems are used for these units.) Where these are not the original scale of survey,Level-4 tracts are normally aggregated from surveys as they are below the ASRIS Mapping Hiatus. In theintensive land-use zone most descriptors for Level 4 are generated as weighted averages and histogramsfrom Level-5 tracts. Additional descriptions provide:• Estimates of the resistance to weathering of the substrate• A text description of the tractIn many cases, the number of Level-4 tracts per Level-3 parent will be greater than seven.24
10 Level-5 descriptors (land system)10.1 IdentifiersMost field-based land resource surveys in Australia’s intensive rainfall zone produce information at Levels 5with descriptions at Level 6. In this section and the next, descriptors are specified for land-unit tracts at thesystem and facet level. State and territory agencies will most commonly provide data at Level 5 (landsystem) with unmapped tracts at Level 6 (land facets). In some instances, land systems or land facets maybe provided at two or more levels of detail (e.g. nested land systems with unmapped facets, or a landsystem with 2 levels of land facet). In some circumstances, the lowest level may only consist of landsystems.Most source data for ASRIS have been collected during particular projects that cover a specified area anddefined period. Project and agency codes are provided with all data. In the case of soil profile data collectedindependently of survey projects, a miscellaneous code (MISC) is used along with the Agency Code. Statesand territories need to provide unique Level-5 identifiers for each land-system tract. Extra identifiers(component and proportion) are needed when the land-unit tract is described but not mapped. Theidentifiers are summarized in Table 7.Table 7: Level-5 land-unit tract identifiersVariable Definition Example CommentsAgency code SITES agency code 505Project codeFeatureidentificationHierarchylevelComponentidentificationAgency code for the sourcesurveyAgency defined and uniquenumber for the tractLevel in the ASRIS land-unithierarchyUnique code for the unmappedcomponent if presentALP58 (Alpinesurvey, 1958)mtk00245Feature name Name of feature Mt Kosciuszkoland systemFeaturedescriptionProportionPlain text description of the landunitArea occupied by the tract withinthe parent land unit5.0See ASRIS Website for a fulllisting of codes0 0 required for referentialintegrityText can also include abroad description of thetract (
Page 1: SUSTAINABLE AGRICULTURE FLAGSHIPThe
Page 6 and 7: Table 1: Complementary benefits of
Page 8 and 9: Table 62: The num_est_method_type t
Page 11 and 12: 1 SummaryThis document specifies th
Page 13 and 14: 2 User needs for soil and land reso
Page 15 and 16: 2.3 Mapping, monitoring, modelling,
Page 17 and 18: estimates of soil erosion by water.
Page 19 and 20: 3 Development of ASRISASRIS was ini
Page 21 and 22: Handbook (NCST 2009) will be famili
Page 23 and 24: 4.2 Upper levels of the hierarchyTh
Page 25 and 26: 5 Accuracy, precision and a basis f
Page 27 and 28: 1.0MeanProbability5 %quantile95 %qu
Page 29 and 30: 6 Level-1 descriptors (land provinc
Page 31 and 32: Figure 5: Relative reliefFigure 6:
Page 33: Figure 7: Average annual excess wat
Page 37 and 38: 10.3 LandformRelief/modal slopeReli
Page 39 and 40: 11 Level-6 descriptors (land facets
Page 41 and 42: Table 15: Landform elements (after
Page 43 and 44: Table 17: Described gilgai componen
Page 45 and 46: (a) (b) (c)A11A11A1 1A21A222B23B22B
Page 47 and 48: Layer-1 Texture and clay contentThe
Page 49 and 50: ZL Silty loam ZLA Sapric silty loam
Page 51 and 52: Coarse fragmentsCoarse fragments ar
Page 53 and 54: pH profileThe pH in a 1:5 CaCl 2 so
Page 55 and 56: Total thickness of A horizonThe tot
Page 57 and 58: Table 31: Method for the estimation
Page 59 and 60: Profile availablewater capacityAdju
Page 61 and 62: Table 32: Permeability classesClass
Page 63 and 64: Table 34: Estimation method for ele
Page 65 and 66: Exchangeable bases, CEC, and ESPEst
Page 67 and 68: Australian Soil ClassificationThe A
Page 69 and 70: FH Palic GZ Bleached-Orthic IS Ferr
Page 71 and 72: Table 47: Reference Soil Group code
Page 73 and 74: Local taxonomic classIf available,
Page 75 and 76: 12 Soil Profile DatabaseAs noted ea
Page 77 and 78: Figure 12: Database design for ASRI
Page 79 and 80: Table 57: The ref_sites tableColumn
Page 81 and 82: Table 61: The param_num_method tabl
Page 83 and 84: Table 68: The codes table.Column Na
Page 85 and 86:
15 ReferencesACLEP (in prep.) SITES
Page 87 and 88:
McKenzie NJ, Ryan PJ (1999) Spatial
Page 89 and 90:
Appendix 1: Conversion for pH in wa
Page 92:
CONTACT USt 1300 363 400+61 3 9545
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ASRIS Technical Specifications V1.6

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