Title

Fire history overlay of most recent fires 

Alternate title

FIRE_HISTORY_LASTBURNT 

Purpose

This data is derived from the FIRE_HISTORY dataset. The layer stores details of the last time an area was known to be burnt by wildfire or prescribed burning. It is current to 2022/23 fire season and includes severity, except for Gippsland 18/19 and 19/20 severity. 

Credit

Anthony Cheesman, DELWP, Hume. Andrew Matthews NRE, Fire Management Sandro Condurso Natural Resource Systems 

Supplemental Information

History: This data set has been derived from the Fire100_XY layer. Coverages based on year within the Fire100_XY layer have been overlayed with each other. This was performed in a cyclic manner based on one years data overlaying the preceding years. This allows for the most recent information to be the last information overlayed. As this dataset is wholly derived from Fire100_XY, attributes and lookup tables for Lastburnt100 have been mimicked. Layer design for Lastburnt100 has been maintained due to this dependency. Any changes identifiable in this layer design need to be addressed to the Fire100_XY dataset. Relationship to other Datasets: This dataset is wholly derived from Fire100_XY. Fire100_XY is updated annually and this layer will need to be re-derived to maintain its currency. Current Design Issues: The current layer design reflects the structure of DELWPs FIRES (FIREWEB) and FUEL MANAGEMENT (FMS) databases and emap spatial extents. The firekey attribute in the dataset provides the link to these two FFMVIC databases and CFAs IMS database. Other dataset attributes allow information annotated on source maps to be entered, especially in the case of historical fire information where no fire key is often provided to allow referencing to the relevent Fire database. The location attribute (that is replicated as part of the firekey attribute) can be either the former Forests Commission of Victoria (FCV) district, former Fire region, or current Fire District. It is currently proposed that only fire history information from the 1996/97 season inclusive will require the location and firekey fields to be completed. If historical fires are to have the firekey attribute recorded then this issue, particularly validation checks, will require further consideration. Future Design Issues: Future enhancements to this layer may include fire frequency information and possibly changing the layer into a raster format, ie. ArcInfo GRID. Related Documents: None 

Status

Completed  

Horizontal Accuracy

100m  

Code

4283 

Maintenance and update frequency

Irregular  

Topic category

• Environment

Classification

Unclassified  

Statement

Dataset Source: Derived from Fire100_XY, which was constructed from regional fire records in the form of fire history maps. (Refer to Fire100_XY for further information) Dataset Originality: Derived 

Description

Collection Method: Consecutive overlay of Fire100_XY layers, from the older fire seasons to the most recent fire seasons. (Refer to Fire100_XY for further information) 

Description

Dataset standardisation has occurred to bring all datasets into line with current structure. All tiles within the Fire100_XY have been processed using a standard aml tool to create Lastburnt100. Coverages based on year within the Fire100_XY layer have been overlayed with each other. This was performed in a cyclic manner based on one years data overlaying the preceding years, allowing for the most recent information to be the last information overlayed. 

Classification

Unclassified  

Attribute Quality

Comments

Based on attribute checking procedures, an error of 1 in 20 is reasonable for the fire year, ie. 95% attribute accuracy. 

Positional Accuracy

Comments

Precision: 10 m to 100 m Determination: Deductive estimate 

Conceptual Consistency

Missing Data

Comments

(Refer to Fire100_XY for further information) (Refer to Fire100_XY for further information) 

Excess Data