GEDI L2B Raster Canopy Cover Vertical Profile Metrics (Version 2)

Dataset Availability

2019-03-25T00:00:00Z–2023-03-01T08:00:00Z

Dataset Provider

Rasterization: Google and USFS Laboratory for Applications of Remote Sensing in Ecology (LARSE) NASA GEDI mission, accessed through the USGS LP DAAC

Earth Engine Snippet

ee.ImageCollection("LARSE/GEDI/GEDI02_B_002_MONTHLY")

Tags

elevation gedi larse nasa tree-cover usgs

Description

GEDI Level 2B Canopy Cover and Vertical Profile Metrics product (GEDI02_B) extracts biophysical metrics from each GEDI waveform. These metrics are based on the directional gap probability profile derived from the L1B waveform.

The vertical step between foliage profile measurements (known as dZ in GEDI documentation) is always 5 meters.

The dataset LARSE/GEDI/GEDI02_B_002_MONTHLY is a raster version of the original GEDI02_B product. The raster images are organized as monthly composites of individual orbits in the corresponding month. Only root-level cover, pai and pavd values and their associated quality flags and metadata are preserved as raster bands. Each GEDI02_B_002 raster has 109 bands.

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

Bands

Resolution
25 meters

Bands

Name	Units	Min	Max	Description
algorithmrun_flag		0	1	The L2B algorithm is run if this flag is set to 1 indicating data have sufficient waveform fidelity for L2B to run.
beam		0	11	Beam number
cover	%	0	1	Total canopy cover
degrade_flag		0	99	Flag indicating degraded state of pointing and/or positioning information. 3X - ADF CHU solution unavailable (ST-2) 4X - Platform attitude 5X - Poor solution (filter covariance large) 6X - Data outage (platform attitude gap also) 7X - ST 1+2 unavailable (similar boresight FOV) 8X - ST 1+2+3 unavailable 9X - ST 1+2+3 and ISS unavailable X1 - Maneuver X2 - GPS data gap X3 - ST blinding X4 - Other X5 - GPS receiver clock drift X6 - Maneuver & GPS receiver clock drift X7 - GPS data gap & GPS receiver clock drift X8 - ST blinding & GPS receiver clock drift X9 - Other & GPS receiver clock drift
delta_time	seconds			Transmit time of the shot, measured in seconds from the master_time_epoch since 2018-01-01
fhd_normal				Foliage Height Diversity
l2b_quality_flag	Quality Flag	0	1	L2B quality flag
local_beam_azimuth	rad	-180	180	Azimuth of the unit pointing vector for the laser in the local ENU frame measured from North and positive towards East.
local_beam_elevation	rad	1.39	1.57	Elevation of the unit pointing vector for the laser in the local ENU frame measured from East-North plane and positive towards Up.
pai	Area fraction			Total Plant Area Index
pgap_theta		0	1	Total Gap Probability (theta)
selected_l2a_algorithm		1	6	Selected L2A algorithm setting
selected_rg_algorithm		0	99	Selected R (ground) algorithm
sensitivity		0	1	Maxmimum canopy cover that can be penetrated. Valid range is [0, 1]. Values outside of this range may be present but must be ignored. They represent noise and non-land surface waveforms.
solar_azimuth	deg	-180	180	The azimuth of the sun position vector from the laser bounce point position in the local ENU frame measured from North and is positive towards East.
solar_elevation	deg	-90	90	The elevation of the sun position vector from the laser bounce point position in the local ENU frame measured from the East-North plane and is positive Up.
shot_number				Shot number, a unique identifier. This field has the format of OOOOOBBRRGNNNNNNNN, where: OOOOO: Orbit number BB: Beam number RR: Reserved for future use G: Sub-orbit granule number NNNNNNNN: Shot index
shot_number_within_beam				Shot number within beam
cover_z0	%	0	1	Cumulative canopy cover vertical profile at 0%
cover_z1	%	0	1	Cumulative canopy cover vertical profile at 1%
cover_z2	%	0	1	Cumulative canopy cover vertical profile at 2%
cover_z3	%	0	1	Cumulative canopy cover vertical profile at 3%
cover_z4	%	0	1	Cumulative canopy cover vertical profile at 4%
cover_z5	%	0	1	Cumulative canopy cover vertical profile at 5%
cover_z6	%	0	1	Cumulative canopy cover vertical profile at 6%
cover_z7	%	0	1	Cumulative canopy cover vertical profile at 7%
cover_z8	%	0	1	Cumulative canopy cover vertical profile at 8%
cover_z9	%	0	1	Cumulative canopy cover vertical profile at 9%
cover_z10	%	0	1	Cumulative canopy cover vertical profile at 10%
cover_z11	%	0	1	Cumulative canopy cover vertical profile at 11%
cover_z12	%	0	1	Cumulative canopy cover vertical profile at 12%
cover_z13	%	0	1	Cumulative canopy cover vertical profile at 13%
cover_z14	%	0	1	Cumulative canopy cover vertical profile at 14%
cover_z15	%	0	1	Cumulative canopy cover vertical profile at 15%
cover_z16	%	0	1	Cumulative canopy cover vertical profile at 16%
cover_z17	%	0	1	Cumulative canopy cover vertical profile at 17%
cover_z18	%	0	1	Cumulative canopy cover vertical profile at 18%
cover_z19	%	0	1	Cumulative canopy cover vertical profile at 19%
cover_z20	%	0	1	Cumulative canopy cover vertical profile at 20%
cover_z21	%	0	1	Cumulative canopy cover vertical profile at 21%
cover_z22	%	0	1	Cumulative canopy cover vertical profile at 22%
cover_z23	%	0	1	Cumulative canopy cover vertical profile at 23%
cover_z24	%	0	1	Cumulative canopy cover vertical profile at 24%
cover_z25	%	0	1	Cumulative canopy cover vertical profile at 25%
cover_z26	%	0	1	Cumulative canopy cover vertical profile at 26%
cover_z27	%	0	1	Cumulative canopy cover vertical profile at 27%
cover_z28	%	0	1	Cumulative canopy cover vertical profile at 28%
cover_z29	%	0	1	Cumulative canopy cover vertical profile at 29%
cover_z30	%	0	1	Cumulative canopy cover vertical profile at 30%
pai_z0	Area fraction			Plant Area Index profile in 0 m²/m²
pai_z1	Area fraction			Plant Area Index profile in 1 m²/m²
pai_z2	Area fraction			Plant Area Index profile in 2 m²/m²
pai_z3	Area fraction			Plant Area Index profile in 3 m²/m²
pai_z4	Area fraction			Plant Area Index profile in 4 m²/m²
pai_z5	Area fraction			Plant Area Index profile in 5 m²/m²
pai_z6	Area fraction			Plant Area Index profile in 6 m²/m²
pai_z7	Area fraction			Plant Area Index profile in 7 m²/m²
pai_z8	Area fraction			Plant Area Index profile in 8 m²/m²
pai_z9	Area fraction			Plant Area Index profile in 9 m²/m²
pai_z10	Area fraction			Plant Area Index profile in 10 m²/m²
pai_z11	Area fraction			Plant Area Index profile in 11 m²/m²
pai_z12	Area fraction			Plant Area Index profile in 12 m²/m²
pai_z13	Area fraction			Plant Area Index profile in 13 m²/m²
pai_z14	Area fraction			Plant Area Index profile in 14 m²/m²
pai_z15	Area fraction			Plant Area Index profile in 15 m²/m²
pai_z16	Area fraction			Plant Area Index profile in 16 m²/m²
pai_z17	Area fraction			Plant Area Index profile in 17 m²/m²
pai_z18	Area fraction			Plant Area Index profile in 18 m²/m²
pai_z19	Area fraction			Plant Area Index profile in 19 m²/m²
pai_z20	Area fraction			Plant Area Index profile in 20 m²/m²
pai_z21	Area fraction			Plant Area Index profile in 21 m²/m²
pai_z22	Area fraction			Plant Area Index profile in 22 m²/m²
pai_z23	Area fraction			Plant Area Index profile in 23 m²/m²
pai_z24	Area fraction			Plant Area Index profile in 24 m²/m²
pai_z25	Area fraction			Plant Area Index profile in 25 m²/m²
pai_z26	Area fraction			Plant Area Index profile in 26 m²/m²
pai_z27	Area fraction			Plant Area Index profile in 27 m²/m²
pai_z28	Area fraction			Plant Area Index profile in 28 m²/m²
pai_z29	Area fraction			Plant Area Index profile in 29 m²/m²
pai_z30	Area fraction			Plant Area Index profile in 30 m²/m²
pavd_z0	m^2/m^3			Plant Area Volume Density profile in 0 m²/m³
pavd_z1	m^2/m^3			Plant Area Volume Density profile in 1 m²/m³
pavd_z2	m^2/m^3			Plant Area Volume Density profile in 2 m²/m³
pavd_z3	m^2/m^3			Plant Area Volume Density profile in 3 m²/m³
pavd_z4	m^2/m^3			Plant Area Volume Density profile in 4 m²/m³
pavd_z5	m^2/m^3			Plant Area Volume Density profile in 5 m²/m³
pavd_z6	m^2/m^3			Plant Area Volume Density profile in 6 m²/m³
pavd_z7	m^2/m^3			Plant Area Volume Density profile in 7 m²/m³
pavd_z8	m^2/m^3			Plant Area Volume Density profile in 8 m²/m³
pavd_z9	m^2/m^3			Plant Area Volume Density profile in 9 m²/m³
pavd_z10	m^2/m^3			Plant Area Volume Density profile in 10 m²/m³
pavd_z11	m^2/m^3			Plant Area Volume Density profile in 11 m²/m³
pavd_z12	m^2/m^3			Plant Area Volume Density profile in 12 m²/m³
pavd_z13	m^2/m^3			Plant Area Volume Density profile in 13 m²/m³
pavd_z14	m^2/m^3			Plant Area Volume Density profile in 14 m²/m³
pavd_z15	m^2/m^3			Plant Area Volume Density profile in 15 m²/m³
pavd_z16	m^2/m^3			Plant Area Volume Density profile in 16 m²/m³
pavd_z17	m^2/m^3			Plant Area Volume Density profile in 17 m²/m³
pavd_z18	m^2/m^3			Plant Area Volume Density profile in 18 m²/m³
pavd_z19	m^2/m^3			Plant Area Volume Density profile in 19 m²/m³
pavd_z20	m^2/m^3			Plant Area Volume Density profile in 20 m²/m³
pavd_z21	m^2/m^3			Plant Area Volume Density profile in 21 m²/m³
pavd_z22	m^2/m^3			Plant Area Volume Density profile in 22 m²/m³
pavd_z23	m^2/m^3			Plant Area Volume Density profile in 23 m²/m³
pavd_z24	m^2/m^3			Plant Area Volume Density profile in 24 m²/m³
pavd_z25	m^2/m^3			Plant Area Volume Density profile in 25 m²/m³
pavd_z26	m^2/m^3			Plant Area Volume Density profile in 26 m²/m³
pavd_z27	m^2/m^3			Plant Area Volume Density profile in 27 m²/m³
pavd_z28	m^2/m^3			Plant Area Volume Density profile in 28 m²/m³
pavd_z29	m^2/m^3			Plant Area Volume Density profile in 29 m²/m³
pavd_z30	m^2/m^3			Plant Area Volume Density profile in 30 m²/m³

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.

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Code Editor (JavaScript)

var qualityMask = function(im) {
  return im.updateMask(im.select('l2b_quality_flag').eq(1))
      .updateMask(im.select('degrade_flag').eq(0));
};
var dataset = ee.ImageCollection('LARSE/GEDI/GEDI02_B_002_MONTHLY')
                  .map(qualityMask)
                  .select('solar_elevation');

var gediVis = {
  min: 1,
  max: 60,
  palette: 'red, green, blue',
};
Map.setCenter(12.60033, 51.01051, 12);
Map.addLayer(dataset, gediVis, 'Solar Elevation');

Open in Code Editor

GEDI L2B Raster Canopy Cover Vertical Profile Metrics (Version 2)

GEDI Level 2B Canopy Cover and Vertical Profile Metrics product (GEDI02_B) extracts biophysical metrics from each GEDI waveform. These metrics are based on the directional gap probability profile derived from the L1B waveform. The vertical step between foliage profile measurements (known as dZ in GEDI documentation) is always 5 meters. …

LARSE/GEDI/GEDI02_B_002_MONTHLY, elevation,gedi,larse,nasa,tree-cover,usgs

2019-03-25T00:00:00Z/2023-03-01T08:00:00Z

-51.6 -180.0 51.6 180.0

Google Earth Engine

https://developers.google.com/earth-engine/datasets