GEDI L4D Imputed Waveforms, Version 2

LARSE/GEDI/GEDI04_D_002
Dataset Availability
2019-04-18T00:00:00Z–2023-03-16T00:00:00Z
Dataset Producer
Earth Engine Snippet
ee.ImageCollection("LARSE/GEDI/GEDI04_D_002")
Tags
biomass canopy elevation forest forest-biomass gedi larse nasa tree-cover

Description

The GEDI Level 4D (L4D) product provides a 30-m spatial elaboration of the mission's sample of footprint-level L2A V002, L2B V002, and L4A Version 2.1 products globally between latitudes -51.6 and 51.6 degrees.

A k-nearest neighbors (k-NN) algorithm was used with Landsat time series data to impute high-quality GEDI shots to every 30-m pixel. A different nearest neighbor model was developed for every 10 x 10-km tile, with potential imputed shots drawn from a support area of at least 30 x 30 km centered on the tile. The imputation assigns the single nearest neighbor using Landsat time series imagery centered on the target year 2023.

The most basic 30-m output is the shot number of the imputed pixel (relayed in fragments across five fields), from which any shot-level quantity may be retrieved. Predictions for commonly used waveform attributes are also included, such as relative height (RH) metrics from the L2A product, canopy cover from L2B, and aboveground biomass density (AGBD) from L4A.

See User Guide for more information.

The Global Ecosystem Dynamics Investigation GEDI mission aims to characterize ecosystem structure and dynamics to enable radically improved quantification and understanding of the Earth's carbon cycle and biodiversity. The GEDI instrument, attached to the International Space Station (ISS), collects data globally between 51.6° N and 51.6° S latitudes at the highest resolution and densest sampling of the 3-dimensional structure of the Earth. The GEDI instrument consists of three lasers producing a total of eight beam ground transects, which instantaneously sample eight ~25 m footprints spaced approximately every 60 m along-track.

Product Description
L2A Vector LARSE/GEDI/GEDI02_A_002
L2A Monthly raster LARSE/GEDI/GEDI02_A_002_MONTHLY
L2A table index LARSE/GEDI/GEDI02_A_002_INDEX
L2B Vector LARSE/GEDI/GEDI02_B_002
L2B Monthly raster LARSE/GEDI/GEDI02_B_002_MONTHLY
L2B table index LARSE/GEDI/GEDI02_B_002_INDEX
L4A Biomass Vector LARSE/GEDI/GEDI04_A_002
L4A Monthly raster LARSE/GEDI/GEDI04_A_002_MONTHLY
L4A table index LARSE/GEDI/GEDI04_A_002_INDEX
L4B Biomass LARSE/GEDI/GEDI04_B_002
L4D Imputed Waveforms LARSE/GEDI/GEDI04_D_002

Bands

Bands

Pixel size: 30 meters (all bands)

Name Pixel Size Description
rh10 30 meters

Relative Height metric (rh10)
rh20 30 meters

Relative Height metric (rh20)
rh30 30 meters

Relative Height metric (rh30)
rh40 30 meters

Relative Height metric (rh40)
rh50 30 meters

Relative Height metric (rh50)
rh60 30 meters

Relative Height metric (rh60)
rh70 30 meters

Relative Height metric (rh70)
rh80 30 meters

Relative Height metric (rh80)
rh90 30 meters

Relative Height metric (rh90)
rh95 30 meters

Relative Height metric (rh95)
rh98 30 meters

Relative Height metric (rh98)
cover_z_000 30 meters

Canopy Cover
agbd 30 meters

Aboveground Biomass Density
sensitivity_a2 30 meters

Sensitivity
shot_orbit 30 meters

Orbit component of shot number
shot_beam 30 meters

Beam component of shot number
shot_future 30 meters

Future component of shot number
shot_granule 30 meters

Granule component of shot number
shot_index 30 meters

Shot Index component of shot number
QA 30 meters

Quality Assessment mask

QA Class Table

Value Color Description
0 None

No data (pixel outside zone boundary)
1 None

Valid data
2 None

No data (unavailability of cloud-free CCDC input features)
3 None

No data (nearest shot number truncated in GEE L2A product)
4 None

Masked out (pixels corresponding to permanent water bodies)

Terms of Use

Terms of Use

This dataset is in the public domain and is available without restriction on use and distribution. See NASA's Earth Science Data & Information Policy for additional information.

Citations

Citations:

  • Seo, E., Healey, S. P., Yang, Z., Dubayah, R. O., De Conto, T., & Armston, J. (2025). GEDI L4D Imputed Waveforms, Version 2 (Version 2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2455

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('LARSE/GEDI/GEDI04_D_002');

var visualization = {
  bands: ['agbd'],
  min: 1.0,
  max: 60.0,
  palette: [
    'darkred',
    'red',
    'orange',
    'green',
    'darkgreen',
  ]
};

Map.setCenter(-60.0, -5.0, 6);
Map.addLayer(dataset, visualization, 'Aboveground Biomass Density');
Open in Code Editor
The GEDI Level 4D (L4D) product provides a 30-m spatial elaboration of the mission's sample of footprint-level L2A V002, L2B V002, and L4A Version 2.1 products globally between latitudes -51.6 and 51.6 degrees. A k-nearest neighbors (k-NN) algorithm was used with Landsat time series data to impute high-quality GEDI shots …
LARSE/GEDI/GEDI04_D_002, biomass,canopy,elevation,forest,forest-biomass,gedi,larse,nasa,tree-cover
2019-04-18T00:00:00Z/2023-03-16T00:00:00Z
-90 -180 90 180
Google Earth Engine