FWS Fire Atlas
U.S. Fish & Wildlife Service
When requested by the FWS, or interagency partner program, USGS EROS has mapped wildland fires that are smaller than those mapped by the Monitoring Trends in Burn Severity program (MTBS); MTBS maps fires 1000 acres or greater in the western United states and 500 acres or greater in the eastern United States. These mapped smaller fires have occurred on FWS lands and are available through this Burn Severity Portal.
There were two specific fire extent mapping products created to meet the needs of the USFWS managers. Fire perimeter maps, called FWS Fire Atlases were created for fires occurring on FWS refuge lands from 1984 through 2013. Fire perimeter and severity information, called FWS wetland fires mapped the location, extent, and severity of smaller fires occurring on selected FWS Refuges from 1984 through 2010. Both products were created to provide information to land and refuge managers as they develop resource management plans.
1. FWS Fire Atlases
To create these maps, information was provided by FWS including fire name, discovery date, location coordinates, type of fire (planned or unplanned), and an estimated burn area. These attributes were used to identify approximate location of each fire. Satellite imagery acquired as close to the fire occurrence as possible was then used to detect and delineate the burn extent. In some areas, machine learning models were used to generate probability maps of burned areas and initial fire perimeters which were reviewed and adjusted by analysts. In other areas, analysts delineated the perimeters through direct interpretation of the imagery products. High-resolution imagery and refuge maps were also used to link the provided point reference data to the individual burns. The completed perimeter maps were aggregated for each refuge into a complete atlas or fire history.
All requested Fire Atlases have been completed, 8516 fires in total were mapped within 93 FWS units across the US.
2. FWS Wetland Fires
For selected FWS units, fires smaller than the MTBS threshold size were requested to be mapped to support a variety of policy and resource management information needs. Following MTBS protocols, pre- and post-fire imagery were selected to match the assessment approach based upon landscape/vegetation type. Please review the Mapping Methods | MTBS page for details on this mapping approach.
Fire perimeters are captured as quickly as possible after fire containment is visible in the imagery.
FWS Fire Atlases: 1983 - 2014
FWS Wetland Fires: 1984 - 2010
These products support US FWS land managers in planning activities for their units.
Landsat reflectance, Normalized Burn Ratio, and Normalized Differenced Vegetation Index imagery are used to locate fire scars. Fire perimeters are then digitized from the imagery for each fire and all products for each refuge are bundled into a complete fire atlas.
- Pre , Post, and 1-year post-fire satellite imagery
- Burn area boundary shapefile
- Post-fire Normalized Burn Ratio
- Modeled thematic burned/not-burned product (not available for all atlases)