Add an image source to a Mapbox GL or Maplibre GL map

Usage

add_image_source(
  map,
  id,
  url = NULL,
  data = NULL,
  coordinates = NULL,
  colors = NULL
)

map: A map object created by the mapboxgl or maplibre function.
id: A unique ID for the source.
url: A URL pointing to the image source.
data: A SpatRaster object from the terra package or a RasterLayer object.
coordinates: A list of coordinates specifying the image corners in clockwise order: top left, top right, bottom right, bottom left. For SpatRaster or RasterLayer objects, this will be extracted for you.
colors: A vector of colors to use for the raster image.

The modified map object with the new source added.