Clip GEDI Canopy Cover and Vertical Profile Metrics by geometry
This function clips GEDI level2B derived Canopy Cover and Vertical Profile metrics within a given geometry
clipLevel2BVPMGeometry(level2BVPM, polygon_spdf, split_by)
level2BVPM |
A GEDI Level2B object (output of |
polygon_spdf |
Polygon. An object of class |
split_by |
Polygon id. If defined, GEDI data will be clipped by each polygon using the attribute specified by |
Returns an S4 object of class data.table-class
containing the Canopy Cover and Vertical Profile metrics.
https://lpdaac.usgs.gov/products/gedi02_bv001/
# 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) # 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) # Clipping level2BVPM by geometry level2b_clip_geometry <- clipLevel2BVPMGeometry(level2BVPM,polygon_spdf,split_by="id") hasLeaflet = require(leaflet) if (hasLeaflet) { leaflet() %>% addCircleMarkers(level2b_clip_geometry$longitude_bin0, level2b_clip_geometry$latitude_bin0, radius = 1, opacity = 1, color = "red") %>% addScaleBar(options = list(imperial = FALSE)) %>% addPolygons(data=polygon_spdf,weight=1,col = 'white', opacity = 1, fillOpacity = 0) %>% addProviderTiles(providers$Esri.WorldImagery) } close(level2b)
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