Table 3 Filtering parameters for GEDI L4A, HLS, and Sentinel 1 C.
From: Aboveground biomass density maps for post-hurricane Ian forest monitoring in Florida
Sensor | Filter parameter | Description |
|---|---|---|
GEDI L4A | “l4_quality_flag” = 1 | Filters high-quality Level 4A data footprints |
“degrade_flag” = 0 | Excludes degraded data to ensure reliability | |
“beam” ≥ 4 | Filters footprints with higher reliability based on beam strength | |
“solar_elevation” ≤ 0 | Filters for nighttime acquisitions to avoid sunlight interference | |
Land cover classes | Focuses on trees and shrubs based on Google Dynamic World | |
HLS | Fmask! = 1, 2, 3 | Excludes pixels classified as cloud (1), cloud shadow (2), or snow (3) |
“cloud_coverage” ≤ 30 | Filters images with less than 30% cloud cover from the HLSL30 catalog | |
B5 ≥ 0.2 | Filters non-water pixels with near infrared reflectance ≥ 0.2 | |
Sentinel 1 C | “transmitterReceiverPolarisation” = VV or VH | Filters for data containing VV or VH polarization |
“instrumentMode” = IW | Filters for data collected in Interferometric Wide Swath mode |
