# Fields Within the Gedi Cal/Val Data

Author: Samuel Ayers (UAH)

Updated: June 30, 2020

The Global Ecosystem Dynamics Investigation (GEDI) Forest Structure and Biomass Database (FSBD) is a collection of field and LiDAR datasets developed to serve a central repository for calibration and validation of the GEDI mission data. The GEDI Cal/Val Field Data collection contains the field data contributions to the FSBD. The database has contributions across the globe for a variety of vegetation types from projects dating back to 2003.

The table below describes the variables found in the files:

variable |
units |
description |
---|---|---|

plot |
NA |
name of plot |

subplot |
NA |
subplot identifier |

survey |
NA |
name of survey event |

private |
NA |
data privacy (1=private, 0=public) |

date |
NA |
date of survey event |

region |
NA |
region of plot location: Eu=Europe; As=Asia; Au=Australia/New Zealand; Af=Africa; SEAsia=South East Asia; SA=South/Central America; US=United States) |

vegetation |
NA |
vegetation type where sampled: Sav = Savannah; TropRF = Tropical rainforest; TempRF = Temperate rainforest; TropSF = Tropical seasonal forest; TempF = Temperate forest; BorF = Boreal forest; Wo = Woodland; Gr = Grassland; Sh = Shrubland; De = Desert |

map |
mm |
mean annual rainfall |

mat |
deg |
mean annual temperature |

pft.modis |
NA |
plant functional type from the nearest MCD12Q1 product date |

pft.name |
NA |
plant functional type from field descriptions or other ancillary data |

wwf.ecoregion |
NA |
Terrestrial ecoregion from the WWF Olson et al. (2004) terrestrial ecoregions of the globe |

latitude |
deg |
latitude of location where sampled (-90 to 90 deg South to North) |

longitude |
deg |
longitude of location where sampled (-180 to 180 deg West to East) |

p.sample |
NA |
subplot type: 0=independent fixed area plots; 1=variable area plots; 2=multiple fixed area plots for aggregation; 3=variable radius sampling |

p.stemmap |
NA |
stem mapped plot (1=TRUE,0=FALSE) |

p.origin |
NA |
origin of the plot, SW has to be interpreted as the lower left corner relative to the orientation |

p.orientation |
deg |
orientation of plot degrees clockwise from UTM map grid north |

p.shape |
NA |
plot shape (E=ellipse, R=rectangle) |

p.majoraxis |
m |
major axis of plot |

p.minoraxis |
m |
minor axis of plot |

p.geom |
m |
plot geometry WKT string |

p.epsg |
NA |
epsg code of the UTM zone used for the tree coordinates |

p.area |
m2 |
plot polygon area |

p.mindiam |
m |
minimum tree diameter measured across all subplots |

sp.geom |
m |
subplot geometry WKT string |

sp.ix |
NA |
subplot track index |

sp.iy |
NA |
subplot pulse index |

sp.shape |
NA |
subplot shape (E=ellipse, R=rectangle) |

sp.area |
m2 |
subplot area |

sp.mindiam |
m |
minimum tree diameter measured for the subplot |

pai |
m2/m2 |
plant area index of vegetation |

lai |
m2/m2 |
leaf area index of vegetation |

cover |
NA |
vertically projected canopy cover (1-Pgap) |

dft |
NA |
dominant plant functional type: EA = evergreen angiosperm; DA = deciduous angiosperm; EG = evergreen gymnosperm; DG = deciduous gymnosperm |

agb |
kg |
mass of above-ground standing trees and shrubs |

agb.valid |
NA |
valid above ground mass prediction (1=TRUE,0=FALSE) |

agb.lower |
kg |
lower limit of standard error of mass of above-ground standing trees and shrubs |

agb.upper |
kg |
upper limit of standard error of mass of above-ground standing trees and shrubs |

agbd.ha |
Mg/ha |
mass density of above-ground standing trees and shrubs |

agbd.ha.lower |
Mg/ha |
lower limit of standard error of mass density of above-ground standing trees and shrubs |

agbd.ha.upper |
Mg/ha |
upper limit of standard error of mass density of above-ground standing trees and shrubs |

sn |
n |
plot stem number |

snd.ha |
n/ha |
plot stem number density |

sba |
m2 |
plot stand basal area |

sba.ha |
m2/ha |
plot stand basal area per hectare |

swsg.ba |
g/cm3/m2 |
basal-area-weighted wood specific gravity |

h.t.max |
m |
maximum total height of plants from ground to highest leaf |

sp.agb |
kg |
subplot mass of above-ground standing trees and shrubs |

sp.agb.valid |
NA |
valid subplot above ground mass prediction (1=TRUE,0=FALSE) |

sp.agbd.ha |
Mg/ha |
subplot mass density of above-ground standing trees and shrubs |

sp.agbd.ha.lower |
Mg/ha |
subplot lower limit of standard error of mass density of above-ground standing trees and shrubs |

sp.agbd.ha.upper |
Mg/ha |
subplot upper limit of standard error of mass density of above-ground standing trees and shrubs |

sp.sba.ha |
m2/ha |
subplot stand basal area per hectare |

sp.swsg.ba |
g/cm3/m2 |
subplot basal-area-weighted wood specific gravity |

sp.h.t.max |
m |
subplot maximum total height of plants from ground to highest leaf |

l.project |
NA |
name of the lidar project dataset on UMD servers |

l.instr |
NA |
lidar instrument manufacturer and model |

l.epsg |
NA |
epsg code of the corresponding lidar data |

l.date |
NA |
date of the corresponding lidar acquisition |

g.fp |
NA |
geometry collection WKT string of GEDI lidar footprint center locations |

tree.date |
NA |
date of tree measurement |

family |
NA |
latin name of botanical family |

species |
NA |
latin name of species (genus species) |

pft |
NA |
plant functional type: EA = evergreen angiosperm; DA = deciduous angiosperm; EG = evergreen gymnosperm; DG = deciduous gymnosperm |

wsg |
g/cm3 |
the ratio of wood density to water |

wsg.sd |
g/cm3 |
standard deviation of WSG sample values |

tree |
NA |
tree identifier |

stem |
NA |
stem identifier |

x |
m |
easting UTM coordinate |

y |
m |
northing UTM coordinate |

z |
m |
elevation relative to geoid coordinate |

status |
NA |
live tree (1=TRUE,0=FALSE) |

allom.key |
NA |
key to allometric LUT |

a.stem |
m2 |
area of total stem cross-section at measurement height |

h.t |
m |
total height of plant from ground to highest leaf |

h.t.mod |
NA |
tree heights modelled using local or regional DBH-Ht relationship |

d.stem |
m |
diameter of stem at measurement height |

d.stem.valid |
NA |
valid tree diameter to use in AGB calculation (1=TRUE,0=FALSE) |

d.ht |
m |
height at which stem diameter was measured |

c.w |
m |
diameter or width of crown |

m.agb |
kg |
mass of above-ground components of tree |