Title

HAZ_TREE_RISK 

Alternate title

HAZ_TREE_RISK 

Purpose

This dataset displays Hazardous Tree (HT) risk across the Victorian public land estate. Areas of public land have been allocated to one of four hazardous tree risk categories (1 = Diminished, 3 = High, 4 = Very High) based on the following equation: Eucalypt ecological fire tolerance level + Fire Severity = Hazardous Tree Risk Rating. 

Supplemental Information

Related Documents: None NOT KNOWN 

Status

Completed  

Horizontal Accuracy

25m  

Code

4283 

Maintenance and update frequency

Unknown  

Topic category

• Environment

Use limitation

Departmental for the trial and development phase. Eventually this dataset is proposed to be available on eMap for open access for all emergency services that have access to eMap. 21/09/15 - Dataset uploaded and available on eMap. 

Classification

Restricted  

Statement

Dataset Source: fire severity data, EVC and SFRI forestry data Built in 2014, using in the development of this dataset BLD_FKA_EASTVIC_2014 as well as work completed by Hans Van Elmpt and Frazer Wilson in 2010/11 BLD_FIRE_KILLED_ASH_2003_TO_2009 was also used in the later version which was built upon by A Cheesman in 2014. Several iterations have been done in 2016 and now in 2022. Dataset Originality: Derived 

Description

Collection Method: aerial imagery 

Description

union fire severity with foresty data 

Classification

Limited Distribution  

Attribute Quality

Comments

Source data attributes logical and consistent. 

Positional Accuracy

Comments

Source data accurate to approximately 1:25000 (fire sev and sfri) and 1:100000(sveg). The data was originally compiled as an ESRI grid dataset with 20m cell size. 

Conceptual Consistency

Comments

Source attributes are logically consistent. 

Missing Data

Comments

Coverage is for the public land estate of Victoria Completeness Verification: This data has not been ground-truthed or verified. As this is a derived and modelled dataset, accuracy of this data is depending on the accuracy of input datasets (SFRI, SVEG, fire severity, LASTLOG25, PLMGEN) and also robustness of methodology. It should also be noted that there are some factors which are known to cause hazardous trees on a local scale (e.g. disease, age, drought, and other weather events) that will not be detected in this approach. 

Excess Data

Comments

Final data is in vector format - classified in the following format 1 = Diminished, 3 = High, 4 = Very High