Calculate Terrain Color Map

Calculates a color for each point on the surface using a direct elevation-to-color mapping.

height_shade(
  heightmap,
  texture = (grDevices::colorRampPalette(c("#6AA85B", "#D9CC9A", "#FFFFFF")))(256),
  range = NULL
)

Arguments

heightmap

A two-dimensional matrix, where each entry in the matrix is the elevation at that point.

texture

Default terrain.colors(256). A color palette for the plot.

range

Default NULL, the full range of the heightmap. A length-2 vector specifying the maximum and minimum values to map the color palette to.

Value

RGB array of hillshaded texture mappings.

Examples

#Create a direct mapping of elevation to color:
montereybay |>
 height_shade() |>
 plot_map()


#Add a shadow:
if(run_documentation()) {
montereybay |>
 height_shade() |>
 add_shadow(ray_shade(montereybay,zscale=50),0.1) |>
 plot_map()
}


#Change the palette:
if(run_documentation()) {
montereybay |>
 height_shade(texture = topo.colors(256)) |>
 add_shadow(ray_shade(montereybay,zscale=50),0.1) |>
 plot_map()
}


#Really change the palette (warning: gratuitous use of rainbow palette):
if(run_documentation()) {
montereybay |>
 height_shade(texture = rainbow(256)) |>
 add_shadow(ray_shade(montereybay,zscale=50),0.1) |>
 plot_map()
}