clipLevel2BVPM: Clip GEDI Canopy Cover and Vertical Profile Metrics by...

In rGEDI: NASA's Global Ecosystem Dynamics Investigation (GEDI) Data Visualization and Processing

Description

This function clips GEDI level2B derived Canopy Cover and Vertical Profile metrics a within given bounding coordinates

Usage

clipLevel2BVPM(level2BVPM, xmin, xmax, ymin, ymax)

Arguments

level2BVPM	A GEDI Level2B object (output of readLevel1B function). An S4 object of class "data.table".
xmin	Numeric. West longitude (x) coordinate of the bounding rectangle, in decimal degrees.
xmax	Numeric. East longitude (x) coordinate of the bounding rectangle, in decimal degrees.
ymin	Numeric. South latitude (y) coordinate of the bounding rectangle, in decimal degrees.
ymax	Numeric. North latitude (y) coordinate of the bounding rectangle, in decimal degrees.

Value

Returns an S4 object of class data.table-class containing the Canopy Cover and Vertical Profile metrics.

See Also

https://lpdaac.usgs.gov/products/gedi02_bv001/

Examples

# Specifying the path to GEDI level2B data (zip file)
outdir = tempdir()
level2B_fp_zip <- system.file("extdata",
                  "GEDI02_B_2019108080338_O01964_T05337_02_001_01_sub.zip",
                  package="rGEDI")

# Unzipping GEDI level2A data
level2Bpath <- unzip(level2B_fp_zip,exdir = outdir)

# Reading GEDI level2B data (h5 file)
level2b<-readLevel2B(level2Bpath=level2Bpath)

# Extracting canopy cover and vertical profile metrics
level2BVPM<-getLevel2BVPM(level2b)

# Bounding rectangle coordinates
xmin = -44.15036
xmax = -44.10066
ymin = -13.75831
ymax = -13.71244

# Clipping level2BVPM by extent boundary box
level2b_clip <- clipLevel2BVPM(level2BVPM,xmin, xmax, ymin, ymax)

hasLeaflet = require(leaflet)

if (hasLeaflet) {
leaflet() %>%
 addCircleMarkers(level2b_clip$longitude_bin0,
                  level2b_clip$latitude_bin0,
                  radius = 1,
                  opacity = 1,
                  color = "red")  %>%
 addScaleBar(options = list(imperial = FALSE)) %>%
 addProviderTiles(providers$Esri.WorldImagery)
}

close(level2b)

rGEDI documentation built on Jan. 19, 2021, 3:01 p.m.