plot: Plot raster objects using 'ggplot'

In 16EAGLE/basemaps: Accessing Spatial Basemaps in R

Plot raster objects using ggplot

Description

This function plots objects of class SpatRaster, RasterLayer, RasterBrick or RasterStack as ggplot2. It is used internally by basemap* functions that return ggplot plots.

Usage

gg_raster(r, r_type = "RGB", gglayer = F, ...)

Arguments

r	raster of class SpatRaster, RasterLayer, RasterBrick or RasterStack.
r_type	character, either "gradient" or "discrete".
gglayer	logical, if FALSE (default), a ggplot2 plot is returned, if TRUE, a ggplot2 layer is returned.
...	additional arguments, including maxpixels, numeric, maximum number of pixels to be plotted (default: number of pixels in r). Use a value lower then ncell(r) to lower resolution for faster plotting. alpha, numeric between 0 and 1, alpha value of the plotted data (transparency). maxColorValue, numeric, the value to use as colour maximum. interpolate, logical, whether to smooth the plot (default is TRUE).

Value

A ggplot2 object

Examples

library(basemaps)

# example extent
data(ext)

## Not run: 
# terra raster object
map <- basemap_terra(ext)

# plotting raster as ggplot using the with fill aesthetic
gg_raster(map, r_type = "RGB")

# or as gg layer using the with fill aesthetic
ggplot() + gg_raster(map, r_type = "RGB", gglayer = T) + scale_fill_identity()

## End(Not run)

16EAGLE/basemaps documentation built on Nov. 25, 2024, 10:15 a.m.