Title

Landsystems 

Alternate title

LSYS100 

Purpose

This data set assists with state and regional planning to define the spatial variation of land according to the parameters of geomorphology, lithology, landform and climate, with dependent variables of soil and vegetation types. Other interpreted data tagged to the land systems includes the hazard potential, ie. inherent susceptibility to various forms of land degradation, and the 'potential productivity'. The maps and land system descriptions are drawn from an uneven database of some 28 individual studies of the land and additional unpublished data, with varying levels of detail and reliability. The land system descriptions are presented as a single line that masks the considerable variation in each land system -- each land system is treated as essentially a single point entity, when in reality it is a complex of land types with a known range of variation. While this is appropriate for some purposes, it is not suitable for all uses, and should be used with care. Potential users not familiar with the land system concept are encouraged to contact the custodian for advice and assistance. Interpretations are of the inherent susceptibility of the land to degradation and do not adequately represent hazards (which involves considerations of land use) which will be of interest to most users. Rowan's initial report, paper maps and transparencies are now considerably out of date following extensive error checking and subsequent revision. While the initial report was never formally released, the revised and expanded Edition 2 is in an advanced stage of preparation and should be released in 1994/95. 

Credit

The land system data set was constructed by Jim Rowan, based on a geomorphic framework erected by Jeff Jenkin, and using more detailed land resource information derived from some twenty-eight other studies by a range of investigators. Rowan supplemented 

Supplemental Information

Relationship to other Datasets: This layer forms a strong relationship with LSYS100 which describes landsystems in more detail. See the previous section for further details. Current Design Issues: The land system code is derived from Geomorphic Unit (GMU), Landform, Lithology and Climate. Future Design Issues: Some of the source information was prepared at a scale of 1:100 000; some of this has been entered into the Department's GIS. The remainder of the information is at a range of scales and is unlikely to be entered into the GIS. New information will be assembled at a scale of 1:100 000 and will be entered into the GIS. Explicit linkages will be established between the two layers as appropriate.<P>Explicit linkages will also be created between layers at larger scales (1:25 000) and point data layers. Related Documents: None The original data set was supported by an unpublished report Land Systems of Victoria, prepared by Jim Rowan for the Land Conservation Council and the Land Protection Branch of DCNR. The revise dataset will be supported by a revised Departmental publication, Land Systems of Victoria - - Edition 2, by Rowan, Russell and Ransome. This report is in preparation and should be released in 1994/95. 

Status

Completed  

Horizontal Accuracy

100m  

Code

4283 

Maintenance and update frequency

Not planned  

Topic category

• Geoscientific information

Use limitation

. 

Classification

Unclassified  

Statement

Dataset Source: Drawn from various Soil Conservation Authority, Department of Conservation, Forests and Land, Department of Conservation and Environment, Department of Conservation and Natural Resources, Department of Agriculture, and CSIRO publications -- see supporting documentation for details. Dataset Originality: Primary 

Description

Collection Method: Publication survey, aerial photo interpretation, field measurements, field notes, and laboratory analysis of samples 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Comments

Precision: 100 m to 1 km. Note: land system boundaries are, in reality, zones of relatively rapid change in relevant land characteristics. Consequently, there is no valid measurement of 'accuracy'. Determination: Estimate 

Conceptual Consistency

Comments

Only landsystem features are completed. 

Missing Data

Comments

The layer, as described, is complete and covers all of Victoria. The layer, as described, is complete and covers all of Victoria. 

Excess Data