Seasonal Herbaceous Wetland likelihood model V1 output (mean and standard deviation)

dataset: SEASONAL-HERBACEOUS-WETLAND-LIKELIHOOD
Modelled likelihood of occurrence of seasonal herbaceous wetlands in south-east Australia using field observations and a suite of temporally informed statistics for indices derived from the Landsat and ALOS satellite platforms. Model outputs include both likelihood and uncertainty surfaces. The likelihood surface depicts the mean likelihood (of 30 independent models) of seasonal herbaceous wetland occurrence at each 25 x 25 m pixel and the uncertainty surface is the standard deviation derived from the set of 30 likelihood of occurrence predictions at each pixel.
 
Citation proposal Citation proposal
(2021)

Seasonal Herbaceous Wetland likelihood model V1 output (mean and standard deviation)

Department of Energy, Environment and Climate Action
 

Description

Title
Seasonal Herbaceous Wetland likelihood model V1 output (mean and standard deviation) 
Alternate title
SEASONAL-HERBACEOUS-WETLAND-LIKELIHOOD 
Resource Type
Dataset  
Purpose
The model outputs will be useful tools for any person or agency requiring an understanding of where seasonal herbaceous wetlands are likely to occur in the landscape. Users include the Commonwealth Government, natural resource management agencies, non-government organisations, state and local government, land developers and landholders. Uses of the model outputs will include: raising awareness of the potential occurrence of seasonal herbaceous wetlands, assisting with urban planning, raising awareness of responsibilities under the EPBC Act, identifying areas to target for landholder incentive programs and assisting with provision of guidance to landholders on protection or restoration of seasonal herbaceous wetlands. A report that describes the model and dataset development can be downloaded from: www.delwp.vic.gov.au/ari/reports (on this page search for seasonal herbaceous wetlands) 
Supplemental Information
Related Documents: None 
Status
Completed  
 
 

Temporal

Time period
2015-03-142016-08-03 
 
 

Spatial

Spatial representation type
Grid  
Description
General - Victoria 
N
S
E
W


 

 

Maintenance

Maintenance and update frequency
As needed  
 
 

Format

Title
DIGITAL - TIFF FORMAT 2 
 
 

Contacts

  Point of contact

Cited responsible party  

No information provided.

Cited responsible party  

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Cited responsible party  

No information provided.

Cited responsible party  

No information provided.
 
 

Keywords

Topic category
  • Inland waters
 
 

Resource Constraints

Use limitation
. 
Classification
Unclassified  
 
 

Lineage

Statement
Dataset Source: Seasonal Herbaceous Wetland likelihood model by ARI, DELWP Dataset Originality: Derived 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Comments
Modelled likelihood of occurrence of seasonal herbaceous wetlands in south-east Australia using field observations and a suite of temporally informed statistics for indices derived from the Landsat and ALOS satellite platforms. Model outputs include both an uncertainty surface and a likelihood surface. The resultant model fits the field observations robustly and model validation suggests that the model extrapolates successfully even when presented with novel field observations.The likelihood surface depicts the mean likelihood (of 30 independent models) of seasonal herbaceous wetland occurrence at each 25 x 25 m pixel and the uncertainty surface is the standard deviation derived from the set of 30 likelihood of occurrence predictions at each pixel. These two surfaces can be combined and/or thresholded for decision making contexts that may be more or less risk averse. Note that the "probability" (i.e. values between 0 and 1) have been changed to integer values from 1-100. In the mean prediction application of the model, probabilities of less than 0.05 have been put to "NoData" 
Positional Accuracy
Conceptual Consistency
Missing Data
Comments
Full Extent of the model - State of Victoria and the following catchment basins: Millicent Coast, Lower Mallee, Lower Murray River Completeness Verification: Not Applicable 
Excess Data
Comments
Modelled spatial extent of the target wetland type using Bagged Random Forests. The resultant model fits the field observations robustly and model validation suggests that the model extrapolates successfully even when presented with novel field observations. Model outputs include both likelihood and uncertainty surfaces. The likelihood surface depicts the mean likelihood (of 30 independent models) of seasonal herbaceous wetland occurrence at each 25 x 25 m pixel and the uncertainty surface is the standard deviation derived from the set of 30 likelihood of occurrence predictions at each pixel. The model found that seasonal herbaceous wetlands are extremely rare even within the bioregions in which they are known to occur. We estimate that they comprise less than 0.001% of the surface area of the relevant lowland bioregions in south-eastern Australia. 
 
 

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