This function takes an 'osmdata' (osm) object and a palette name, preprocesses the
map data if not already done, and plots the map using 'ggplot2' with the specified color palette.
Usage
plot_map(...)
Value
A ggplot object representing the map with the chosen palette.
Arguments
...
Variable argument list:
osm: A list retrieved from osmdata containing map data.
palette: A character string specifying the name of the palette to use. The default is "imhof".
Additional arguments are passed on to the preprocessing and plotting functions.