GEDI L2A Vector Canopy Top Height (Version 2)

Description

GEDI's Level 2A Geolocated Elevation and Height Metrics Product (GEDI02_A) is primarily composed of 100 Relative Height (RH) metrics, which collectively describe the waveform collected by GEDI.

The original GEDI02_A product is a table of point with a spatial resolution (average footprint) of 25 meters.

Please 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

Table Schema

Table Schema

Name Type Description
beam INT

Beam identifier

degrade_flag INT

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 DOUBLE

Time delta since Jan 1 00:00 2018

digital_elevation_model DOUBLE

TanDEM-X elevation at GEDI footprint location

digital_elevation_model_srtm DOUBLE

SRTM elevation at GEDI footprint location

elev_highestreturn DOUBLE

Elevation of highest detected return relative to reference ellipsoid

elev_lowestmode DOUBLE

Elevation of center of lowest mode relative to reference ellipsoid

elevation_bias_flag INT

Elevations potentially affected by 4bin (~60 cm) ranging error

energy_total DOUBLE

Integrated counts in the return waveform relative to the mean noise level

landsat_treecover DOUBLE

Tree cover in the year 2010, defined as canopy closure for all vegetation taller than 5 m in height as a percentage per output grid cell

landsat_water_persistence INT

Percent UMD GLAD Landsat observations with classified surface water

lat_highestreturn DOUBLE

Latitude of highest detected return

leaf_off_doy INT

GEDI 1 km EASE 2.0 grid leaf-off start day-of-year

leaf_off_flag INT

GEDI 1 km EASE 2.0 grid flag

leaf_on_cycle INT

Flag that indicates the vegetation growing cycle for leaf-on observations

leaf_on_doy INT

GEDI 1 km EASE 2.0 grid leaf-on start day-of-year

lon_highestreturn DOUBLE

Longitude of highest detected return

modis_nonvegetated DOUBLE

Percent non-vegetated from MODIS MOD44B V6 data

modis_nonvegetated_sd DOUBLE

Percent non-vegetated standard deviation from MODIS MOD44B V6 data

modis_treecover DOUBLE

Percent tree cover from MODIS MOD44B V6 data

modis_treecover_sd DOUBLE

Percent tree cover standard deviation from MODIS MOD44B V6 data

num_detectedmodes INT

Number of detected modes in rxwaveform

pft_class INT

GEDI 1 km EASE 2.0 grid Plant Functional Type (PFT)

quality_flag INT

Flag indicating likely invalid waveform (1=valid, 0=invalid)

region_class INT

GEDI 1 km EASE 2.0 grid world continental regions

selected_algorithm INT

Identifier of algorithm selected as identifying the lowest non-noise mode

selected_mode INT

Identifier of mode selected as lowest non-noise mode

selected_mode_flag INT

Flag indicating status of selected_mode

sensitivity DOUBLE

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 DOUBLE

The azimuth of the sun position vector from the laser bounce point position in the local ENU frame. The angle is measured from North and is positive towards East.

solar_elevation DOUBLE

The elevation of the sun position vector from the laser bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive Up.

surface_flag INT

Indicates elev_lowestmode is within 300m of Digital Elevation Model (DEM) or Mean Sea Surface (MSS) elevation

urban_focal_window_size INT

The focal window size used to calculate urban_proportion. Values are 3 (3x3 pixel window size) or 5 (5x5 pixel window size).

urban_proportion INT

The percentage proportion of land area within a focal area surrounding each shot that is urban land cover.

orbit_number INT

Orbit number

minor_frame_number INT

Minor frame number 0-241()

shot_number_within_beam INT

Shot number within beam

local_beam_azimuth DOUBLE

Azimuth in radians of the unit pointing vector for the laser in the local ENU frame. The angle is measured from North and positive towards East.

local_beam_elevation DOUBLE

Elevation in radians of the unit pointing vector for the laser in the local ENU frame. The angle is measured from North and positive towards East.

shot_number STRING

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
rh0 DOUBLE

Relative height metrics at 0%

rh1 DOUBLE

Relative height metrics at 1%

rh2 DOUBLE

Relative height metrics at 2%

rh3 DOUBLE

Relative height metrics at 3%

rh4 DOUBLE

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rh5 DOUBLE

Relative height metrics at 5%

rh6 DOUBLE

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rh7 DOUBLE

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rh8 DOUBLE

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rh9 DOUBLE

Relative height metrics at 9%

rh10 DOUBLE

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rh11 DOUBLE

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rh12 DOUBLE

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rh13 DOUBLE

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rh14 DOUBLE

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rh15 DOUBLE

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rh16 DOUBLE

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rh17 DOUBLE

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rh18 DOUBLE

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rh19 DOUBLE

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rh20 DOUBLE

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rh21 DOUBLE

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rh22 DOUBLE

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rh23 DOUBLE

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rh24 DOUBLE

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rh25 DOUBLE

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rh26 DOUBLE

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rh27 DOUBLE

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rh28 DOUBLE

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rh29 DOUBLE

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rh30 DOUBLE

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rh31 DOUBLE

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rh32 DOUBLE

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rh33 DOUBLE

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rh34 DOUBLE

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rh35 DOUBLE

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rh36 DOUBLE

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rh40 DOUBLE

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rh41 DOUBLE

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rh42 DOUBLE

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rh43 DOUBLE

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rh44 DOUBLE

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rh48 DOUBLE

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rh49 DOUBLE

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rh50 DOUBLE

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rh51 DOUBLE

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rh52 DOUBLE

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rh53 DOUBLE

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rh54 DOUBLE

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rh55 DOUBLE

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rh56 DOUBLE

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rh57 DOUBLE

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rh58 DOUBLE

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rh59 DOUBLE

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rh60 DOUBLE

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rh61 DOUBLE

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rh62 DOUBLE

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rh63 DOUBLE

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rh66 DOUBLE

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rh68 DOUBLE

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rh69 DOUBLE

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rh70 DOUBLE

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rh71 DOUBLE

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rh73 DOUBLE

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rh76 DOUBLE

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rh77 DOUBLE

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rh78 DOUBLE

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rh86 DOUBLE

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rh87 DOUBLE

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rh88 DOUBLE

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rh90 DOUBLE

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rh91 DOUBLE

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rh93 DOUBLE

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rh94 DOUBLE

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rh95 DOUBLE

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rh96 DOUBLE

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rh97 DOUBLE

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rh98 DOUBLE

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rh99 DOUBLE

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rh100 DOUBLE

Relative height metrics at 100%

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:
  • GEDI L2A Elevation and Height Metrics Data Global Footprint Level - GEDI02_A Dubayah, R., M. Hofton, J. Blair, J. Armston, H. Tang, S. Luthcke. GEDI L2A Elevation and Height Metrics Data Global Footprint Level V002. 2021, distributed by NASA EOSDIS Land Processes DAAC. Accessed YYYY-MM-DD.

DOIs

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Code Editor (JavaScript)

var dataset = ee.FeatureCollection('LARSE/GEDI/GEDI02_A_002/GEDI02_A_2021244154857_O15413_04_T05622_02_003_02_V002');
dataset = dataset.style({color: 'black',  pointSize: 1});
Map.setCenter(-64.88, -31.77, 15);
Map.addLayer(dataset);
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