rasterize: Rasterize vector data

Description Usage Arguments Value Note See Also Examples

Description

Transfer vector data to a raster

Usage

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## S4 method for signature 'SpatVector,SpatRaster'
rasterize(x, y, field="", fun, ..., background=NA, touches=FALSE,
	update=FALSE, sum=FALSE, cover=FALSE, filename="", overwrite=FALSE, wopt=list())

Arguments

x

SpatVector

y

SpatRaster

field

character or numeric. If field is a character, it should a variable name in x. If field is numeric it typically is a single number or a vector of length nrow(x). The values are recycled to nrow(x)

fun

function, summarizing function that returns a single number; for when there are multiple points in one cell. For example mean, length (to get a count), min or max. Only used if x consists of points

...

additional arguments passed to fun if x has point geometries

background

numeric. Value to put in the cells that are not covered by any of the features of x. Default is NA

touches

logical. If TRUE, all cells touched by lines or polygons are affected, not just those on the line render path, or whose center point is within the polygon. If touches=TRUE, add cannot be TRUE

update

logical. If TRUE, the values of the input SpatRaster are updated

sum

logical. If TRUE, the values of overlapping geometries are summed instead of replaced; and background is set to zero. Only used if x does not consists of points

cover

logical. If TRUE and the geometry of x is polygons, the fraction of a cell that is covered by the polygons is returned. This is estimated by determining presence/absence of the polygon in at least 100 sub-cells (more of there are very few cells)

filename

character. Output filename

overwrite

logical. If TRUE, filename is overwritten

wopt

list with additional arguments for writing files as in writeRaster

Value

SpatRaster

Note

To update existing raster data use the output of rasterize as second argument in cover

See Also

mask

Examples

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f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
r <- rast(v, ncols=75, nrows=100)
#x <- rasterize(v, r, "NAME_2")

#plot(x)
#lines(v)

terra documentation built on Aug. 20, 2021, 9:07 a.m.