Hillshade and shaded relief functions for ggplot2

Provides geom_relief and supporting functions for shaded relief plots.

Usage

geom_relief(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  ...,
  raster = TRUE,
  interpolate = TRUE,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

Arguments

mapping

Set of aesthetic mappings created by aes() or aes_().

data

The data to be displayed in this layer. If NULL, the default data frame will be used.

stat

The statistical transformation to use on the data for this layer. Default is "identity".

position

Position adjustment for overlapping points. Default is "identity".

...

Other arguments passed on to layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like color = "red" or size = 3. They may also be parameters to the paired geom/stat.

raster

Logical, whether to use raster rendering (default TRUE).

interpolate

Logical, whether to interpolate raster (default TRUE).

na.rm

Logical, whether to remove missing values (default FALSE).

show.legend

Logical or NA, whether to include this layer in the legends. Default is NA.

inherit.aes

Logical, whether to inherit aesthetics from the plot mapping. Default is TRUE.

Value

A ggplot2 layer for shaded relief plotting.

See also

.derv, .rgb2hex, rect_to_poly