Methods
Data consist of (1) ten years of MODIS burned area data (500-m resolution) from April 2000-December 2009, (2) USGS historic fire perimeters data from 1980-2007, and (3) the USGS Rocky Mountain Geographic Science Center from 2000-2009.
USGS fire perimeters are expected to be larger compared to MODIS fire products because MODIS can underestimate burned area and because USGS perimeters often do not include unburned islands within the larger perimeters. Neither MODIS nor USGS estimated fire perimeters are expected to differ or be biased by land cover type.