plotRGB: Red-Green-Blue plot of a multi-layered Raster object
Description
Make a Red-Green-Blue plot based on three layers (in a RasterBrick or RasterStack). Three layers (bands) are combined such that one is the red channel, one is the green channel, and one is the blue channel. This function could be used to make 'True (or false) color images' from Landsat and other multi-band satellite images.
Arguments
Methods
plotRGB(x, r=1, g=2, b=3, scale, maxpixels=500000, ext=NULL, ...)rll{
x a RasterBrick or RasterStack object
r Integer. Index of the Red channel, between 1 and nlayers(x)
g Integer. Index of the Green channel, between 1 and nlayers(x)
b Integer. Index of the Blue channel, between 1 and nlayers(x)
scale Integer. Maximum (possible) value in the three channels. Defaults to 255 or to the maximum value of x if that is known and larger than 255
maxpixels Maximum number of pixels to use
ext An extent object to zoom in a region
... graphical parameters as in rasterImage
}