getLevel2AM: Get GEDI Elevation and Height Metrics (GEDI Level2A)

In carlos-alberto-silva/rGEDI: NASA's Global Ecosystem Dynamics Investigation (GEDI) Data Visualization and Processing

Get GEDI Elevation and Height Metrics (GEDI Level2A)

Description

This function extracts Elevation and Relative Height (RH) metrics from GEDI Level2A data.

Usage

getLevel2AM(level2a)

Arguments

level2a

A GEDI Level2A object (output of readLevel2A() function). An S4 object of class "gedi.level2a".

Details

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

• beam Beam identifier

• shot_number Shot number

• degrade_flag Flag indicating degraded state of pointing and/or positioning information

• quality_flag Flag simplifying selection of most useful data

• delta_time Transmit time of the shot since Jan 1 00:00 2018

• sensitivity Maxmimum canopy cover that can be penetrated

• solar_elevation Solar elevation

• lat_lowestmode Latitude of center of lowest mode

• lon_lowestmode Longitude of center of lowest mode

• elev_highestreturn Elevation of highest detected return relative to reference ellipsoid Meters

• elev_lowestmode Elevation of center of lowest mode relative to reference ellipsoid

• rh Relative height metrics at 1% interval

Value

Returns an S4 object of class data.table::data.table containing the elevation and relative heights metrics.

See Also

https://lpdaac.usgs.gov/products/gedi02_av002/

Examples

# Specifying the path to GEDI level2A data (zip file)
outdir = tempdir()
level2A_fp_zip <- system.file("extdata",
                  "GEDI02_A_2019108080338_O01964_T05337_02_001_01_sub.zip",
                  package="rGEDI")

# Unzipping GEDI level2A data
level2Apath <- unzip(level2A_fp_zip,exdir = outdir)

# Reading GEDI level2A data (h5 file)
level2a<-readLevel2A(level2Apath=level2Apath)

# Extracting GEDI Elevation and Height Metrics
level2AM<-getLevel2AM(level2a)
head(level2AM)

close(level2a)

carlos-alberto-silva/rGEDI documentation built on Oct. 18, 2024, 4:46 a.m.