FIRE-MAPS: AVIRIS-3 derived orthorectified canopy water content and fractional cover

This dataset provides per-pixel vegetation canopy water content (CWC) and fractional cover (fCover) derived from spectral radiance measured by the Airborne Visible/Infrared Imaging Spectrometer-3 (AVIRIS-3) instrument between 2023-09-26 and 2023-10-19. This imagery was acquired as part of NASA’s FireSense campaign. AVIRIS-3 measures reflected radiance in 284 bands at 7.5-nanometer (nm) intervals in the visible to shortwave infrared spectral range between 380 and 2500 nm. Measurements were radiometrically and geometrically calibrated as well as atmospherically corrected with the ISOFIT software (Thompson et al. 2018; Brodrick et al. 2025a) and are provided at approximately 3-meter spatial resolution. This dataset includes individual chunks of several flight lines that were flown over Fish Lake (UT) to cover pre- and post-wildfire conditions. CWC files were processed by applying a simple fitting of spectral absorption features of liquid water following Green et al. (2006) and Bohn et al. (2020). Fractional cover products are obtained by using the spectral unmixing approach of Ochoa et al. (2025) and Brodrick et al. (2025b). All files are distributed in orthorectified GeoTIFF format.