This dataset comprises soil property mapping across the whole State of Victoria at 6 prescribed depths. The set depths are 0 to 5 cm, 5 to 15 cm, 15 to 30 cm, 30 to 60 cm, 60 to 100 cm and 100 to 200 cm. The mapped soil properties are pH (1:5 water), EC (dS/m), % clay and soil organic carbon (SOC %).
The dataset has been created by the Understanding Soil and Farming Systems project (CMI 102922)and is referred to as Version 1.0 of the Victorian Digital Soil Map (VIC DSM 1.0).
Soil point data stored in the Victorian Soil Information System (VSIS) from over 6,000 sites has been standardised to the set depths (using equal area splines or a value weighting derived from the proportional contruibution of each sample to the depth class). This processed data was used to attribute soil land units from a collection of surveys (mapped at 1:100k or better) collated to provide the best map unit coverage across the State. Only data from sites that match the soil type of the dominant soil within the land unit being attributed were used. Sites and land units were assigned an Australian Soil Classification (to the Suborder level) to aid this process.
The raw profile data stored in the VSIS (as of March 2013) used to produce these maps were:
pH data were either laboratory based (1:5 soil/water suspension) or field pH (Raupach and Tucker 1959).
Clay % was laboratory derived particle size data (PSA all methods), or converted field observations of texture class (McKenzie et al. 2000).
Organic Carbon measurements methods was either Walkley and Black or Heanes wet oxidation.
Electical Conductivity was 1:5 soil/water extract (dS/m).
The data is available in polygonal format (i.e. the land units) with soil property median value, standard deviation and assignment qualifier attributes. ESRI grids in ascii format at 100 m cell resolution have been generated from the attributed land unit polygon dataset for each soil property at each depth interval.
The assignment qualifiers have been created in order to provide a level of quality evaluation for the soil property assignment to each polygon. Reliability maps generated from these qualifiers have been produced together with each soil property map.
The strength of these products is our ability to leverage on the significant investment in soil site and survey mapping data procurement and the capture of tacit knowledge of former soil surveyors.
A revised version of these digital soil maps is due to be released at the end of 2014.
Search Words:
Farming
,
Geoscientific information
Publication Date:
01 February 2018
Dataset Status:
Some gaps exist where the soil property prediction method did not produce a value
Completeness Verification: -
Progress:
Completed
Access Constraint:
Creative Commons Attribution 4.0 (CC-BY)
(
License Text
)
Unrestricted
The detail available in the current datasets is good for their mapping scale but is not sufficient to provide landscape analysis at finer scales and should not therefore be used to plan land use strategies at more detailed scales (eg. 1:25 000 and larger).
It should be noted that soil attributes (for example texture, sodicity, pH) are expected to vary between acquired soil sites. As the variability of soil attributes within a map unit is difficult to predict, it is important to note that representative soils should be used as a guide only.
This dataset comprises soil property mapping across the whole State of Victoria at 6 prescribed depths. The set depths are 0 to 5 cm, 5 to 15 cm, 15 to 30 cm, 30 to 60 cm, 60 to 100 cm and 100 to 200 cm. The mapped soil properties are pH (1:5 water), EC (dS/m), % clay and soil organic carbon (SOC %).
The dataset has been created by the Understanding Soil and Farming Systems project (CMI 102922)and is referred to as Version 1.0 of the Victorian Digital Soil Map (VIC DSM 1.0).
Soil point data stored in the Victorian Soil Information System (VSIS) from over 6,000 sites has been standardised to the set depths (using equal area splines or a value weighting derived from the proportional contruibution of each sample to the depth class). This processed data was used to attribute soil land units from a collection of surveys (mapped at 1:100k or better) collated to provide the best map unit coverage across the State. Only data from sites that match the soil type of the dominant soil within the land unit being attributed were used. Sites and land units were assigned an Australian Soil Classification (to the Suborder level) to aid this process.
The raw profile data stored in the VSIS (as of March 2013) used to produce these maps were:
pH data were either laboratory based (1:5 soil/water suspension) or field pH (Raupach and Tucker 1959).
Clay % was laboratory derived particle size data (PSA all methods), or converted field observations of texture class (McKenzie et al. 2000).
Organic Carbon measurements methods was either Walkley and Black or Heanes wet oxidation.
Electical Conductivity was 1:5 soil/water extract (dS/m).
The data is available in polygonal format (i.e. the land units) with soil property median value, standard deviation and assignment qualifier attributes. ESRI grids in ascii format at 100 m cell resolution have been generated from the attributed land unit polygon dataset for each soil property at each depth interval.
The assignment qualifiers have been created in order to provide a level of quality evaluation for the soil property assignment to each polygon. Reliability maps generated from these qualifiers have been produced together with each soil property map.
The strength of these products is our ability to leverage on the significant investment in soil site and survey mapping data procurement and the capture of tacit knowledge of former soil surveyors.
A revised version of these digital soil maps is due to be released at the end of 2014.
Search Words:
Farming
,
Geoscientific information
Purpose:
....
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
150
-39
Beginning to Ending Date:
2012-07-01 - 2013-06-30
Maintainence and Update Frequency:
As needed
Stored Data Format:
Available Format(s) Types:
ArcGIS shapefile
Positional Accuracy:
Not defined
Attribute Accuracy:
Labelled with third tier geomorph eg. 1.3.1
Logical Consistency:
Not defined
Data Source:
Dataset Source: Land unit survey mapping
Soil profile and chemistry data held in, or prepared for, the Victorian Soil Information System
Dataset Originality: Primary & Derived
Contact Organisation:
Contact Position:
Address:
Telephone:
Facsimile:
Email Address:
Metadata Date:
2019-05-30
Additional Metadata:
Relationship to other Datasets: Many of the boundaries (ideally) are derived fro the aggregation of land units/land systems, forming a hierarchical land type, particularly in relation to landform.
Current Design Issues: -
Future Design Issues: -
Related Documents: None
http://vro.depi.vic.gov.au/dpi/vro/coranregn.nsf/pages/soil_landform_map
http://vro.depi.vic.gov.au/dpi/vro/coranregn.nsf/pages/soil_landform_map
))