clipLevel2AGeometry: Clip GEDI Level2A data by geometry

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

Description

This function clips GEDI Level2A data within a given geometry

Usage

clipLevel2AGeometry(level2a, polygon_spdf, output="", split_by=NULL)

Arguments

level2a	A GEDI Level2A object (output of readLevel2A function). An S4 object of class "gedi.level2a".
polygon_spdf	Polygon. An object of class SpatialPolygonsDataFrame-class, which can be loaded as an ESRI shapefile using raster::shapefile() function in the raster package.
output	optional character path where to save the new h5file. Default "" (temporary file).
split_by	Polygon id. If defined, GEDI data will be clipped by each polygon using the attribute specified by split_by from the attribute table.

Value

Returns a list of S4 object of class "gedi.level2a" containing clipped GEDI Level2A data.

See Also

https://lpdaac.usgs.gov/products/gedi02_av001/

Examples

outdir = tempdir()

# Specifying the path to GEDI level2A data (zip file)
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)

# Specifying the path to shapefile
polygon_filepath <- system.file("extdata", "stands_cerrado.shp", package="rGEDI")

# Reading shapefile as SpatialPolygonsDataFrame object
library(raster)
polygon_spdf<-shapefile(polygon_filepath)

# Specifying output file and path
output<-file.path(outdir,"GEDI02_A_2019108080338_O01964_T05337_02_001_01_clip")

# Clipping GEDI Level2A data by geometry
level2a_clip <- clipLevel2AGeometry(level2a, polygon_spdf = polygon_spdf,
                                   output=output,
                                   split_by="id")
close(level2a)
lapply(level2a_clip, close)

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