raster: cover – R documentation

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cover

Replace NA values with values of other layers

Description

For Raster* objects: Replace NA values in the first Raster object (x) with the values of the second (y), and so forth for additional Rasters. If x has multiple layers, the subsequent Raster objects should have the same number of layers, or have a single layer only (which will be recycled).

For SpatialPolygons* objects: Areas of x that overlap with y are replaced by (or intersected with) y.

Usage

## S4 method for signature 'RasterLayer,RasterLayer'
cover(x, y, ..., filename='')

## S4 method for signature 'RasterStackBrick,Raster'
cover(x, y, ..., filename='')

## S4 method for signature 'SpatialPolygons,SpatialPolygons'
cover(x, y, ..., identity=FALSE)

Arguments

`x`	Raster* or SpatialPolygons* object
`y`	Same as `x`
`filename`	character. Output filename (optional)
`...`	Same as `x`. If `x` is a Raster* object, also additional arguments as for `writeRaster`
`identity`	logical. If `TRUE` overlapping areas are intersected rather than replaced

Value

RasterLayer or RasterBrick object, or SpatialPolygons object

Examples

# raster objects
r1 <- raster(ncols=36, nrows=18)
values(r1) <- 1:ncell(r1)
r2 <- setValues(r1, runif(ncell(r1)))
r2[r2 < 0.5] <- NA
r3 <- cover(r2, r1)


#SpatialPolygons
if (require(rgdal) & require(rgeos)) {
	p <- shapefile(system.file("external/lux.shp", package="raster"))
	b <- as(extent(6, 6.4, 49.75, 50), 'SpatialPolygons')
	crs(b) <- crs(p)
	b <- SpatialPolygonsDataFrame(b, data.frame(ID_1=9))
	
	cv1 <- cover(p, b)
	cv2 <- cover(p, b, identity=TRUE)
}

raster

Geographic Data Analysis and Modeling

v3.4-10

GPL (>= 3)

Authors

Robert J. Hijmans [cre, aut] (<https://orcid.org/0000-0001-5872-2872>), Jacob van Etten [ctb], Michael Sumner [ctb], Joe Cheng [ctb], Dan Baston [ctb], Andrew Bevan [ctb], Roger Bivand [ctb], Lorenzo Busetto [ctb], Mort Canty [ctb], Ben Fasoli [ctb], David Forrest [ctb], Aniruddha Ghosh [ctb], Duncan Golicher [ctb], Josh Gray [ctb], Jonathan A. Greenberg [ctb], Paul Hiemstra [ctb], Kassel Hingee [ctb], Institute for Mathematics Applied Geosciences [cph], Charles Karney [ctb], Matteo Mattiuzzi [ctb], Steven Mosher [ctb], Babak Naimi [ctb], Jakub Nowosad [ctb], Edzer Pebesma [ctb], Oscar Perpinan Lamigueiro [ctb], Etienne B. Racine [ctb], Barry Rowlingson [ctb], Ashton Shortridge [ctb], Bill Venables [ctb], Rafael Wueest [ctb]

Initial release

2021-05-02