l4_xvar: Get xvar information from a single path of GEDI Level 4 file

In VangiElia/GEDI4R: What the Package Does (One Line, Title Case)

Get xvar information from a single path of GEDI Level 4 file

Description

Get GEDI L4 xvar information from h5 file format.These information are related to the Level 2A predictors used to obtain the AGBD estimates and can be used to reconstruct L2A metrics used for the estimation and the AGBD estimates itself. See here for more documentation on GEDI L4 data.

Usage

l4_xvar(gediL4_path)

Arguments

gediL4_path

Character path to GEDI level 4A h5 file.

Details

Part of columns in the output are also present in the output of l4_getmulti. The other columns are described in the chapter "data characteristics" on this page. Relevant columns are:

• rh_index.x: Vector of the height percentile associated with the given RH metric in GEDI L2A.

• predictor_is.x: The variable predictor_id provides a mapping between rh_index and par

• par.x: The vector par contains coefficients of the linear model used to predict AGBD, where the first element is the intercept and subsequent elements are slope coefficients

• V.x : Values of scaled and transformed GEDI l2A RH metrics entered in the selected model to estimate AGBD

For more information on these data see the Frequently asked question here. Note that by default the function will drop all footprint in which agbd<0. These observations are considered sensor errors.

Value

an S4 object of class data.table.

VangiElia/GEDI4R documentation built on April 8, 2023, 6:13 p.m.