Geolocation-Corrected GEDI L2A Footprints in Japan (2019–2023)

Abstract This dataset contains geolocation-corrected GEDI (Global Ecosystem Dynamics Investigation) L2A footprints collected between 2019 and 2023 across Japan. Utilizing publicly available DEM covering 153,670.85 km² of Japan’s land area, we applied correction methods to over 2.7 million forest footprints. Among them, 1.84 million observations were successfully corrected. Validation using independent airborne LiDAR-derived canopy height data demonstrated a significant accuracy improvement, with the relative root mean squared error reduced from 35.55% to 21.07%. Note that only footprints located within forested areas and covered by DEM data are retained, and footprints where correction failed have been excluded. Sample codes for both the group-level and point-level geolocation correction methods are provided in the file Sample_codes.md. --------------------------------------------------------------------------------------------------------------------------------------------- Time span: 2019–2023 Coordinate system: WGS84 (EPSG:4326) --------------------------------------------------------------------------------------------------------------------------------------------- Variables in dataset Column Description sen Beam sensitivity (from original GEDI L2A) G_ele GEDI terrain elevation at the original footprint location(from original GEDI L2A) TanX_ele TanDEM or auxiliary DEM terrain elevation at the original footprint location(from original GEDI L2A) algorithm GEDI algorithm (from original GEDI L2A) solar_elev Solar elevation at acquisition time (from original GEDI L2A) beams GEDI beams id (from original GEDI L2A) dates Acquisition date (from original GEDI L2A) orbit GEDI orbit number (from original GEDI L2A) orig_mae Absolute difference between original GEDI terrain elevation and ALS DEM best_mae Absolute difference between corrected GEDI terrain elevation and ALS DEM shift_x Applied offset in the X direction (meters) for correction shift_y Applied offset in the Y direction (meters) for correction year Acquisition year geometry Corrected footprint location in EPSG:4326