Accessing National MTBS Datasets
National MTBS datasets are accessible via the links below:

National MTBS Burned Area Boundaries Dataset	National MTBS Fire Occurrence Dataset	National MTBS Burn Severity Mosaics

MTBS National Dataset Availability
Selected MTBS data layers are provided here as seamless national datasets. Burned area boundary polygons for each MTBS fire are provided as a single nationwide vector GIS dataset with pertinent attributes. Calculated geographic centroid of the burned area boundaries for each fire are attributed with relevant fire occurrence information and provided as a single nationwide point GIS dataset. In response to user requests new with this release (and for future releases), the regional annual thematic burn severity raster data seamless mosaics broken out by MTBS mapping zone are being replaced with a series of national mosaics. The new national seamless mosaicked datasets will be available for CONUS, Alaska, Hawaii, and Puerto Rico on an annual basis.

MTBS Data Production Schedule
MTBS National datasets are generated according to zonal and temporal specifications. MTBS fire mapping (burn severity assessment) is conducted concurrently for both current and historical fires. Current MTBS fires occur in the 2004-2010 time period and are mapped nationwide on annual intervals. Historical MTBS fires occur from 1984 to 2003 and are mapped by MTBS mapping zones for specified 2-year production cycles during the MTBS project.

Please note that prior to the completion of the 1984 to 2010 MTBS data record in early 2012, fire-level datasets for all MTBS fires in a given year may not be available for the entire country. Consequently, national datasets are comprised of the fire-level datasets available for distribution at that time. Please see the status map that displays by Landsat path/row the MTBS fire availability status by year of fire occurrence. MTBS burned area boundaries, fire occurrence locations and thematic burn severity datasets for fires within specific path/rows indicated as complete for specified years are included in the national datasets.

Quality Control and MTBS Data Revisions
MTBS fire-level datasets undergo a quality control review by the project after the original data are compiled. As a result, original MTBS national/regional datasets published on this web page are subject to revision. Consequently, if an MTBS fire-level dataset is revised, the national and regional datasets are updated using the revised fire-level dataset.