Product Description
The Fire Return Interval (FRI) product quantifies the average period between fires under the presumed historical fire regime. FRI is intended to describe one component of historical fire regime characteristics in the context of the broader historical time period represented by the LANDFIRE Biophysical Settings (BpS) product and BpS Model documentation.
At the release of LF 2016 Remap Fire Return Interval (FRI_ALLFIR) was included as an attribute in the Biophysical Settings (BPS) product. Then, in calendar year 2024, this product became a stand-alone product once again.

Fire Return Interval Resources
LF 2016 Attribute Data Table (CSV)
LF 2023 Attribute Data Table (CSV) - AK Only
LF 2016 Attribute Data Dictionary (ADD)
LF 2023 Attribute Data Dictionary (ADD) - AK Only
LF 2016 Attribute Data Table (CSV)
LF 2023 Attribute Data Table (CSV) - AK Only
LF 2016 Attribute Data Dictionary (ADD)
LF 2023 Attribute Data Dictionary (ADD) - AK Only
LF Definitions, Quality, and Standards - provides information about contributors, metadata and data standards, data creation, and data testing. This document also provides details about our general data release process.
LF Dictionary - a “one-stop shop” general resource that provides information about products, Attribute Data Dictionaries (ADDs), data and metadata, and terms.
LF Version Comparison Table - view the version history for each individual product.
LF Naming Conventions - understanding the version number
LF Definitions, Quality, and Standards - provides information about contributors, metadata and data standards, data creation, and data testing. This document also provides details about our general data release process.
LF Dictionary - a “one-stop shop” general resource that provides information about products, Attribute Data Dictionaries (ADDs), data and metadata, and terms.
LF Version Comparison Table - view the version history for each individual product.
LF Naming Conventions - understanding the version number