layer_spatial function

Turn a spatial object into a ggplot2 layer

See also layer_spatial.Raster(), layer_spatial.stars(), layer_spatial.SpatRaster() and layer_spatial.bbox() for implementations for other types of spatial objects.

layer_spatial(data, mapping, ...)

annotation_spatial(data, mapping, ...)

## Default S3 method:
layer_spatial(
  data,
  mapping = aes(),
  inherit.aes = FALSE,
  sf_params = list(),
  ...
)

## Default S3 method:
annotation_spatial(
  data,
  mapping = aes(),
  inherit.aes = FALSE,
  sf_params = list(),
  ...
)

shadow_spatial(data, ...)

## Default S3 method:
shadow_spatial(data, ...)

Arguments

• data: An object that can be coerced to an sf object using st_as_sf .
• mapping: A mapping, created using aes .
• ...: Passed to geom_sf
• inherit.aes: Inherit aesthetics from ggplot()?
• sf_params: Passed to st_as_sf .

Returns

A ggplot2 layer .

Examples

library(ggplot2)
load_longlake_data(
  which = c(
    "longlake_roadsdf",
    "longlake_depthdf",
    "longlake_depth_raster"
  )
)

ggplot() +

  # annotation_spatial() layers don't train the scales, so data stays central
  annotation_spatial(longlake_roadsdf, size = 2, col = "black") +
  annotation_spatial(longlake_roadsdf, size = 1.6, col = "white") +

  # raster layers train scales and get projected automatically
  layer_spatial(longlake_depth_raster, aes(alpha = after_stat(band1)), fill = "darkblue") +
  scale_alpha_continuous(na.value = 0) +

  # layer_spatial() layers train the scales
  layer_spatial(longlake_depthdf, aes(col = DEPTH_M)) +

  # spatial-aware automagic scale bar
  annotation_scale(location = "tl") +

  # spatial-aware automagic north arrow
  annotation_north_arrow(location = "br", which_north = "true")