GEDI L2A Raster Canopy Top Height (Version 2)

LARSE/GEDI/GEDI02_A_002_MONTHLY
Dataset Availability
2019-03-25T00:00:00Z–2022-01-01T08:00:00
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("LARSE/GEDI/GEDI02_A_002_MONTHLY")
Tags
elevation gedi larse nasa treecover usgs

Description

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.

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.

The GEDI L2A Vector data can be found in the table collection LARSE/GEDI/GEDI02_A_002.

The GEDI L4B biomass data can be found in the image LARSE/GEDI/GEDI04_B_002.

See User Guide for more information.

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 Meters

TanDEM-X elevation at GEDI footprint location

digital_elevation_model_srtm Meters

STRM elevation at GEDI footprint location

elev_highestreturn Meters -1000 25000

Elevation of highest detected return relative to reference ellipsoid

elev_lowestmode Meters -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 Percent

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 Degree -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 Degree -180 180

Longitude of highest detected return

modis_nonvegetated Percent

Percent non-vegetated from MODIS MOD44B V6 data

modis_nonvegetated_sd Percent

Percent non-vegetated standard deviation from MODIS MOD44B V6 data

modis_treecover Percent

Percent tree cover from MODIS MOD44B V6 data

modis_treecover_sd Percent

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

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 Pixels 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 radians

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 radians

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 Meters -213 213

Relative height metrics at 0%

rh1 Meters -213 213

Relative height metrics at 1%

rh2 Meters -213 213

Relative height metrics at 2%

rh3 Meters -213 213

Relative height metrics at 3%

rh4 Meters -213 213

Relative height metrics at 4%

rh5 Meters -213 213

Relative height metrics at 5%

rh6 Meters -213 213

Relative height metrics at 6%

rh7 Meters -213 213

Relative height metrics at 7%

rh8 Meters -213 213

Relative height metrics at 8%

rh9 Meters -213 213

Relative height metrics at 9%

rh10 Meters -213 213

Relative height metrics at 10%

rh11 Meters -213 213

Relative height metrics at 11%

rh12 Meters -213 213

Relative height metrics at 12%

rh13 Meters -213 213

Relative height metrics at 13%

rh14 Meters -213 213

Relative height metrics at 14%

rh15 Meters -213 213

Relative height metrics at 15%

rh16 Meters -213 213

Relative height metrics at 16%

rh17 Meters -213 213

Relative height metrics at 17%

rh18 Meters -213 213

Relative height metrics at 18%

rh19 Meters -213 213

Relative height metrics at 19%

rh20 Meters -213 213

Relative height metrics at 20%

rh21 Meters -213 213

Relative height metrics at 21%

rh22 Meters -213 213

Relative height metrics at 22%

rh23 Meters -213 213

Relative height metrics at 23%

rh24 Meters -213 213

Relative height metrics at 24%

rh25 Meters -213 213

Relative height metrics at 25%

rh26 Meters -213 213

Relative height metrics at 26%

rh27 Meters -213 213

Relative height metrics at 27%

rh28 Meters -213 213

Relative height metrics at 28%

rh29 Meters -213 213

Relative height metrics at 29%

rh30 Meters -213 213

Relative height metrics at 30%

rh31 Meters -213 213

Relative height metrics at 31%

rh32 Meters -213 213

Relative height metrics at 32%

rh33 Meters -213 213

Relative height metrics at 33%

rh34 Meters -213 213

Relative height metrics at 34%

rh35 Meters -213 213

Relative height metrics at 35%

rh36 Meters -213 213

Relative height metrics at 36%

rh37 Meters -213 213

Relative height metrics at 37%

rh38 Meters -213 213

Relative height metrics at 38%

rh39 Meters -213 213

Relative height metrics at 39%

rh40 Meters -213 213

Relative height metrics at 40%

rh41 Meters -213 213

Relative height metrics at 41%

rh42 Meters -213 213

Relative height metrics at 42%

rh43 Meters -213 213

Relative height metrics at 43%

rh44 Meters -213 213

Relative height metrics at 44%

rh45 Meters -213 213

Relative height metrics at 45%

rh46 Meters -213 213

Relative height metrics at 46%

rh47 Meters -213 213

Relative height metrics at 47%

rh48 Meters -213 213

Relative height metrics at 48%

rh49 Meters -213 213

Relative height metrics at 49%

rh50 Meters -213 213

Relative height metrics at 50%

rh51 Meters -213 213

Relative height metrics at 51%

rh52 Meters -213 213

Relative height metrics at 52%

rh53 Meters -213 213

Relative height metrics at 53%

rh54 Meters -213 213

Relative height metrics at 54%

rh55 Meters -213 213

Relative height metrics at 55%

rh56 Meters -213 213

Relative height metrics at 56%

rh57 Meters -213 213

Relative height metrics at 57%

rh58 Meters -213 213

Relative height metrics at 58%

rh59 Meters -213 213

Relative height metrics at 59%

rh60 Meters -213 213

Relative height metrics at 60%

rh61 Meters -213 213

Relative height metrics at 61%

rh62 Meters -213 213

Relative height metrics at 62%

rh63 Meters -213 213

Relative height metrics at 63%

rh64 Meters -213 213

Relative height metrics at 64%

rh65 Meters -213 213

Relative height metrics at 65%

rh66 Meters -213 213

Relative height metrics at 66%

rh67 Meters -213 213

Relative height metrics at 67%

rh68 Meters -213 213

Relative height metrics at 68%

rh69 Meters -213 213

Relative height metrics at 69%

rh70 Meters -213 213

Relative height metrics at 70%

rh71 Meters -213 213

Relative height metrics at 71%

rh72 Meters -213 213

Relative height metrics at 72%

rh73 Meters -213 213

Relative height metrics at 73%

rh74 Meters -213 213

Relative height metrics at 74%

rh75 Meters -213 213

Relative height metrics at 75%

rh76 Meters -213 213

Relative height metrics at 76%

rh77 Meters -213 213

Relative height metrics at 77%

rh78 Meters -213 213

Relative height metrics at 78%

rh79 Meters -213 213

Relative height metrics at 79%

rh80 Meters -213 213

Relative height metrics at 80%

rh81 Meters -213 213

Relative height metrics at 81%

rh82 Meters -213 213

Relative height metrics at 82%

rh83 Meters -213 213

Relative height metrics at 83%

rh84 Meters -213 213

Relative height metrics at 84%

rh85 Meters -213 213

Relative height metrics at 85%

rh86 Meters -213 213

Relative height metrics at 86%

rh87 Meters -213 213

Relative height metrics at 87%

rh88 Meters -213 213

Relative height metrics at 88%

rh89 Meters -213 213

Relative height metrics at 89%

rh90 Meters -213 213

Relative height metrics at 90%

rh91 Meters -213 213

Relative height metrics at 91%

rh92 Meters -213 213

Relative height metrics at 92%

rh93 Meters -213 213

Relative height metrics at 93%

rh94 Meters -213 213

Relative height metrics at 94%

rh95 Meters -213 213

Relative height metrics at 95%

rh96 Meters -213 213

Relative height metrics at 96%

rh97 Meters -213 213

Relative height metrics at 97%

rh98 Meters -213 213

Relative height metrics at 98%

rh99 Meters -213 213

Relative height metrics at 99%

rh100 Meters -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 in Earth Engine

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');