Surface Carbonate

Dataset Number1040
Dataset TitleSurface Carbonate
CustodianData Authority: Department for Environment and Water
Data Provider: Department for Environment and Water


DescriptionSoils containing carbonates of calcium, and to a lesser extent magnesium, are widespread across Southern South Australia, particularly in the less than 400 mm rainfall zone. They can occur as finely divided segregations mixed with sand and clay particlesSELECT 1 FROM DUAL; as hard nodules or concretions (commonly called rubble)SELECT 1 FROM DUAL; or as sheet rock or calcareous hardpan (commonly called calcrete). Fine carbonates reduce the availability of several nutrients, restrict the performance of a range of crops and pastures, and retard the breakdown of some herbicides. These effects are amplified in very highly calcareous soils. Hard carbonates reduce available waterholding capacity, and in the case of calcrete, limit rootzone depth. Three Surface Carbonate analysis data classes (surface soil reaction to 1 M HCl) have been supplied, as percentage values of Soil Landscape Map Units to be used for the calculation of spatial data statistics. Note: the sum of all percentage values for each map unit totals 100%. Each Soil Landscape Map Unit is categorised INTO seven (plus not applicable) legend categories (CARB_SURF) according to the proportion of its area with calcareous surface soils (ie fine carbonate in the soil matrix).
UsageLink to Soil Attribute Descriptions.. This dataset has been derived from the Soil Landscape Map Units spatial dataset to be used for map creation or the calculation of spatial data statistics. Used to supply Government, community groups, industry and the general public with up to date regional, subregional and catchment level land and soil attribute information for southern South Australia. The aim is to produce maps, statistics and reports displaying and describing: Land and soil attributes within southern South AustraliaSELECT 1 FROM DUAL; Land surface features affecting land use, land management and productivitySELECT 1 FROM DUAL; Limitations / suitability of land and soil for a range of agricultural and other uses. Further information: soil and land attributes. Surface Carbonate dataset can be viewed at NatureMaps (>Soils>Soil Chemistry Attributes). Spatial data downloads are available from Data SA.

Data Quality

LineageThe dataset is based on an interpretation of 1:40,000 stereo colour aerial photography and limited field inspection of landscapes and soils by soil scientists. Soil Landscape Map Unit boundaries were determined after an integration of field observations and recordingsSELECT 1 FROM DUAL; laboratory analysesSELECT 1 FROM DUAL; stereoscopic examination of aerial photographsSELECT 1 FROM DUAL; understanding of regional landscape processes and stratigraphySELECT 1 FROM DUAL; existing soil and geological mapping data. To avoid inconsistencies and confusion, any updates to the Soil and Land Attribute mapping are to be managed by DEWNR Soil and Land Program. This data has been released under a Creative Commons licence. Where products are derived from this data, DEWNR are to be acknowledged, and any changes to the original data should be indicated.
CompletenessComplete. The spatial data is subject to amendment as and when more data become available.
Positional AccuracyThe accuracy is to the scale of mapping (50 metres at 1:50,000 and 300 metres at 1:100,000 mapping scale). The spatial data is to be used at the regional, subregional and catchment-level, and can be used to provide property overviewsSELECT 1 FROM DUAL; however, they cannot to be used at the paddock level. South East, Kangaroo Island, Mount Lofty Ranges and the 'bottom' of Yorke Peninsula have been mapped at 1:50,000. Eyre Peninsula, the main part of Yorke Peninsula, Murray Mallee and Northern Agricultural Districts have been mapped at 1:100,000.

Geographic Extent

Extent NameAgricultural Region - South Australia
Min Easting or Longitude132.25
Min Northing or Latitude-38
Max Easting or Longitude141
Max Northing or Latitude-32.25

Dataset Status

Initially Acquired01-JAN-2000
Last Updated01-JUL-2009
Update FrequencyAs required
Maintenance MethodAs required
LicenseingCC BY (Attribution)


TableNameField AliasData TypeDescription
Landscape.SALAD_Carbonate_SurfaceLANSLU textSoil Landscape Map Unit
Landscape.SALAD_Carbonate_SurfaceCARB_SURF textProportion of land with calcareous surface soils (Legend category. See layer file for descriptions)
Landscape.SALAD_Carbonate_SurfaceKA1 NumberPercentage of map unit with no reaction to 1 M HCl (non calcareous)
Landscape.SALAD_Carbonate_SurfaceKA2 NumberPercentage of map unit with a strong reaction to 1 M HCl (very highly calcareous)
Landscape.SALAD_Carbonate_SurfaceKA3 NumberPercentage of map unit with slight to moderate reaction to 1 M HCl (slightly to highly calcareous)
Landscape.SALAD_Carbonate_SurfaceKAX NumberPercentage of map unit which is not applicable

Contact Information

OrganisationDepartment for Environment and Water
Science Monitoring and Knowledge
Postal AddressGPO Box 1047