* Metric Name: Time Since Last Fire  

* Tier: 2  

* Data Vintage: 2021  

* Unit Of Measure: Years

Time Since Last Fire (TSLF), from the Fire Return Interval Departure (FRID)
map, provides information (in years) to indicate the length of time since an
area last burned.

* Creation Method: Time Since Last Fire (TSLF), from the Fire Return Interval Departure (FRID) map, provides information (in years) to indicate the length of time since an area last burned. Specifically, the number of years elapsed between the most recent fire recorded in the fire perimeters database and the version year of the FRID map being used. To illustrate, if the version year of the FRID map is 2019, and the area in question last burned in 1995, TSLF will be 24 (2019 minus 1995).  

* Credits: Fire History (2021), CAL FIRE \--Department of Forestry and Fire Protection Existing Vegetation (CALVEG 2011), USDA Forest Service, Region 5, MARS Team \--Region 5 - Pacific Southwest Region