rasterToPoints: Raster to points conversion

In raster: Geographic Data Analysis and Modeling

Raster to points conversion

Description

Raster to point conversion. Cells with NA are not converted. A function can be used to select a subset of the raster cells (by their values).

Usage

rasterToPoints(x, fun=NULL, spatial=FALSE, ...)

Arguments

x	A Raster* object
fun	Function to select a subset of raster values
spatial	Logical. If TRUE, the function returns a SpatialPointsDataFrame object
...	Additional arguments. Currently only progress to specify a progress bar. "text", "window", or "" (the default, no progress bar)

Details

fun should be a simple function returning a logical value.

E.g.: fun=function(x){x==1} or fun=function(x){x>3}

Value

A matrix with three columns: x, y, and v (value), or a SpatialPointsDataFrame object

Examples

 
r <- raster(nrow=18, ncol=36)
values(r) <- runif(ncell(r)) * 10
r[r>8] <- NA
p <- rasterToPoints(r)
p <- rasterToPoints(r, fun=function(x){x>6})
#plot(r)
#points(p)

raster documentation built on Oct. 3, 2024, 1:08 a.m.