rasterToContour function

Raster to contour lines conversion

RasterLayer to contour lines. This is a wrapper around contourLines

rasterToContour(x, maxpixels=100000, ...)

Arguments

• x: a RasterLayer object
• maxpixels: Maximum number of raster cells to use; this function fails when too many cells are used
• ...: Any argument that can be passed to contourLines

Details

Most of the code was taken from maptools::ContourLines2SLDF, by Roger Bivand & Edzer Pebesma

Returns

SpatialLinesDataFrame

Examples

f <- system.file("external/test.grd", package="raster")
r <- raster(f)
x <- rasterToContour(r)
class(x)
plot(r)
plot(x, add=TRUE)