GEDI L2A Raster Canopy Top Height (Version 2)

LARSE/GEDI/GEDI02_A_002_MONTHLY
Dataset Availability
2019-03-25T00:00:00Z–2023-03-01T08:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("LARSE/GEDI/GEDI02_A_002_MONTHLY")
Tags
elevation gedi larse nasa tree-cover usgs

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. The dataset LARSE/GEDI/GEDI02_A_002_MONTHLY is a raster version of the original GEDI02_A product. The raster images are organized as monthly composites of individual orbits in the corresponding month. Only root-level RH values and their associated quality flags and metadata are preserved as raster bands. Each GEDI02_A_002 raster has 136 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
beam 0 12

Beam identifier
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

Time delta since Jan 1 00:00 2018
digital_elevation_model m

TanDEM-X elevation at GEDI footprint location
digital_elevation_model_srtm m

SRTM elevation at GEDI footprint location
elev_highestreturn m -1000 25000

Elevation of highest detected return relative to reference ellipsoid
elev_lowestmode m -1000 25000

Elevation of center of lowest mode relative to reference ellipsoid
elevation_bias_flag 0 1

Elevations potentially affected by 4bin (~60 cm) ranging error
energy_total -5000 5e+06

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

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 0 100

Percent UMD GLAD Landsat observations with classified surface water
lat_highestreturn deg -55 55

Latitude of highest detected return
leaf_off_doy 1 365

GEDI 1 km EASE 2.0 grid leaf-off start day-of-year
leaf_off_flag 0 1

GEDI 1 km EASE 2.0 grid flag
leaf_on_cycle 1 2

Flag that indicates the vegetation growing cycle for leaf-on observations
leaf_on_doy 1 365

GEDI 1 km EASE 2.0 grid leaf-on start day-of-year
lon_highestreturn deg -180 180

Longitude of highest detected return
modis_nonvegetated %

Percent non-vegetated from MODIS MOD44B V6 data
modis_nonvegetated_sd %

Percent non-vegetated standard deviation from MODIS MOD44B V6 data
modis_treecover %

Percent tree cover from MODIS MOD44B V6 data
modis_treecover_sd %

Percent tree cover standard deviation from MODIS MOD44B V6 data
num_detectedmodes 0 20

Number of detected modes in rxwaveform
pft_class 0 11

GEDI 1 km EASE 2.0 grid Plant Functional Type (PFT)
quality_flag 0 1

Flag indicating likely invalid waveform (1=valid, 0=invalid)
region_class 0 7

GEDI 1 km EASE 2.0 grid world continental regions
selected_algorithm 1 6

Identifier of algorithm selected as identifying the lowest non-noise mode
selected_mode 0 20

Identifier of mode selected as lowest non-noise mode
selected_mode_flag 0 1

Flag indicating status of selected_mode
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

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

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 0 1

Indicates elev_lowestmode is within 300m of Digital Elevation Model (DEM) or Mean Sea Surface (MSS) elevation
urban_focal_window_size pixel 3 5

The focal window size used to calculate urban_proportion. Values are 3 (3x3 pixel window size) or 5 (5x5 pixel window size).
urban_proportion 0 100

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

Orbit number
minor_frame_number

Minor frame number 0-241()
shot_number_within_beam

Shot number within beam
local_beam_azimuth rad

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 rad

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.
rh0 m -213 213

Relative height metrics at 0%
rh1 m -213 213

Relative height metrics at 1%
rh2 m -213 213

Relative height metrics at 2%
rh3 m -213 213

Relative height metrics at 3%
rh4 m -213 213

Relative height metrics at 4%
rh5 m -213 213

Relative height metrics at 5%
rh6 m -213 213

Relative height metrics at 6%
rh7 m -213 213

Relative height metrics at 7%
rh8 m -213 213

Relative height metrics at 8%
rh9 m -213 213

Relative height metrics at 9%
rh10 m -213 213

Relative height metrics at 10%
rh11 m -213 213

Relative height metrics at 11%
rh12 m -213 213

Relative height metrics at 12%
rh13 m -213 213

Relative height metrics at 13%
rh14 m -213 213

Relative height metrics at 14%
rh15 m -213 213

Relative height metrics at 15%
rh16 m -213 213

Relative height metrics at 16%
rh17 m -213 213

Relative height metrics at 17%
rh18 m -213 213

Relative height metrics at 18%
rh19 m -213 213

Relative height metrics at 19%
rh20 m -213 213

Relative height metrics at 20%
rh21 m -213 213

Relative height metrics at 21%
rh22 m -213 213

Relative height metrics at 22%
rh23 m -213 213

Relative height metrics at 23%
rh24 m -213 213

Relative height metrics at 24%
rh25 m -213 213

Relative height metrics at 25%
rh26 m -213 213

Relative height metrics at 26%
rh27 m -213 213

Relative height metrics at 27%
rh28 m -213 213

Relative height metrics at 28%
rh29 m -213 213

Relative height metrics at 29%
rh30 m -213 213

Relative height metrics at 30%
rh31 m -213 213

Relative height metrics at 31%
rh32 m -213 213

Relative height metrics at 32%
rh33 m -213 213

Relative height metrics at 33%
rh34 m -213 213

Relative height metrics at 34%
rh35 m -213 213

Relative height metrics at 35%
rh36 m -213 213

Relative height metrics at 36%
rh37 m -213 213

Relative height metrics at 37%
rh38 m -213 213

Relative height metrics at 38%
rh39 m -213 213

Relative height metrics at 39%
rh40 m -213 213

Relative height metrics at 40%
rh41 m -213 213

Relative height metrics at 41%
rh42 m -213 213

Relative height metrics at 42%
rh43 m -213 213

Relative height metrics at 43%
rh44 m -213 213

Relative height metrics at 44%
rh45 m -213 213

Relative height metrics at 45%
rh46 m -213 213

Relative height metrics at 46%
rh47 m -213 213

Relative height metrics at 47%
rh48 m -213 213

Relative height metrics at 48%
rh49 m -213 213

Relative height metrics at 49%
rh50 m -213 213

Relative height metrics at 50%
rh51 m -213 213

Relative height metrics at 51%
rh52 m -213 213

Relative height metrics at 52%
rh53 m -213 213

Relative height metrics at 53%
rh54 m -213 213

Relative height metrics at 54%
rh55 m -213 213

Relative height metrics at 55%
rh56 m -213 213

Relative height metrics at 56%
rh57 m -213 213

Relative height metrics at 57%
rh58 m -213 213

Relative height metrics at 58%
rh59 m -213 213

Relative height metrics at 59%
rh60 m -213 213

Relative height metrics at 60%
rh61 m -213 213

Relative height metrics at 61%
rh62 m -213 213

Relative height metrics at 62%
rh63 m -213 213

Relative height metrics at 63%
rh64 m -213 213

Relative height metrics at 64%
rh65 m -213 213

Relative height metrics at 65%
rh66 m -213 213

Relative height metrics at 66%
rh67 m -213 213

Relative height metrics at 67%
rh68 m -213 213

Relative height metrics at 68%
rh69 m -213 213

Relative height metrics at 69%
rh70 m -213 213

Relative height metrics at 70%
rh71 m -213 213

Relative height metrics at 71%
rh72 m -213 213

Relative height metrics at 72%
rh73 m -213 213

Relative height metrics at 73%
rh74 m -213 213

Relative height metrics at 74%
rh75 m -213 213

Relative height metrics at 75%
rh76 m -213 213

Relative height metrics at 76%
rh77 m -213 213

Relative height metrics at 77%
rh78 m -213 213

Relative height metrics at 78%
rh79 m -213 213

Relative height metrics at 79%
rh80 m -213 213

Relative height metrics at 80%
rh81 m -213 213

Relative height metrics at 81%
rh82 m -213 213

Relative height metrics at 82%
rh83 m -213 213

Relative height metrics at 83%
rh84 m -213 213

Relative height metrics at 84%
rh85 m -213 213

Relative height metrics at 85%
rh86 m -213 213

Relative height metrics at 86%
rh87 m -213 213

Relative height metrics at 87%
rh88 m -213 213

Relative height metrics at 88%
rh89 m -213 213

Relative height metrics at 89%
rh90 m -213 213

Relative height metrics at 90%
rh91 m -213 213

Relative height metrics at 91%
rh92 m -213 213

Relative height metrics at 92%
rh93 m -213 213

Relative height metrics at 93%
rh94 m -213 213

Relative height metrics at 94%
rh95 m -213 213

Relative height metrics at 95%
rh96 m -213 213

Relative height metrics at 96%
rh97 m -213 213

Relative height metrics at 97%
rh98 m -213 213

Relative height metrics at 98%
rh99 m -213 213

Relative height metrics at 99%
rh100 m -213 213

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.

Explore with Earth Engine

Code Editor (JavaScript)

var qualityMask = function(im) {
  return im.updateMask(im.select('quality_flag').eq(1))
      .updateMask(im.select('degrade_flag').eq(0));
};
var dataset = ee.ImageCollection('LARSE/GEDI/GEDI02_A_002_MONTHLY')
                  .map(qualityMask)
                  .select('rh98');

var gediVis = {
  min: 1,
  max: 60,
  palette: 'darkred,red,orange,green,darkgreen',
};
Map.setCenter(-74.803466, -9.342209, 10);
Map.addLayer(dataset, gediVis, 'rh98');
Open in Code Editor
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. The dataset LARSE/GEDI/GEDI02_A_002_MONTHLY is a …
LARSE/GEDI/GEDI02_A_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