layer_spatial.SpatRaster function

Spatial ggplot2 layer for SpatRaster objects

This is intended for use with RGB(A) rasters (e.g., georeferenced imagery or photos). To work with bands as if they were columns, use df_spatial

and geom_raster . data

Format

An object of class StatSpatialRaster (inherits from Stat, ggproto, gg) of length 3.

An object of class StatSpatRaster (inherits from StatSpatialRaster, Stat, ggproto, gg) of length 3.

An object of class StatSpatRasterDf (inherits from Stat, ggproto, gg) of length 5.

An object of class GeomSpatRaster (inherits from Geom, ggproto, gg) of length 5.

## S3 method for class 'SpatRaster'
layer_spatial(
  data,
  mapping = NULL,
  interpolate = NULL,
  is_annotation = FALSE,
  lazy = FALSE,
  dpi = 150,
  ...
)

## S3 method for class 'SpatRaster'
annotation_spatial(data, mapping = NULL, interpolate = NULL, ...)

StatSpatRaster

StatSpatRasterAnnotation

StatSpatRasterDf

GeomSpatRaster

Arguments

• data: A SpatRaster object created with terra::rast().
• mapping: Currently, only RGB or RGBA rasters are supported. In the future, one may be able to map specific bands to the fill and alpha aesthetics.
• interpolate: Interpolate resampling for rendered raster image
• is_annotation: Lets raster exist without modifying scales
• lazy: Delay projection and resample of raster until the plot is being rendered
• dpi: if lazy = TRUE, the dpi to which the raster should be resampled
• ...: Passed to other methods

Returns

A ggplot2 layer

Examples

library(ggplot2)
load_longlake_data(
  which = c(
    "longlake_osm",
    "longlake_depth_raster"
  ),
  raster_format = "terra"
)
ggplot() +
  layer_spatial(longlake_osm)

ggplot() +
  layer_spatial(longlake_depth_raster) +
  scale_fill_continuous(
    na.value = NA,
    type = "viridis"
  )