Save PNG

Writes the hillshaded map to file.

save_png(
  hillshade,
  filename,
  title_text = NA,
  title_offset = c(20, 20),
  title_color = "black",
  title_size = 30,
  title_font = "sans",
  title_style = "normal",
  title_bar_color = NA,
  title_bar_alpha = 0.5,
  title_just = "left",
  rotate = 0,
  asp = 1
)

Arguments

hillshade

Array (or matrix) of hillshade to be written.

filename

String with the filename. If .png is not at the end of the string, it will be appended automatically.

title_text

Default NULL. Text. Adds a title to the image, using magick::image_annotate().

title_offset

Default c(20,20). Distance from the top-left (default, gravity direction in image_annotate) corner to offset the title.

title_color

Default black. Font color.

title_size

Default 30. Font size in pixels.

title_font

Default sans. String with font family such as "sans", "mono", "serif", "Times", "Helvetica", "Trebuchet", "Georgia", "Palatino" or "Comic Sans".

title_style

Default normal. Font style (e.g. italic).

title_bar_color

Default NA. If a color, this will create a colored bar under the title.

title_bar_alpha

Default 0.5. Transparency of the title bar.

title_just

Default left. Position of the title.

rotate

Default 0. Rotates the output. Possible values: 0, 90, 180, 270.

asp

Default 1. Aspect ratio of the resulting plot. Use asp = 1/cospi(mean_latitude/180) to rescale lat/long at higher latitudes to the correct the aspect ratio.

Examples

filename_map = tempfile()

#Save the map into `filename_map`
montereybay %>%
 sphere_shade() %>%
 save_png(filename_map)
 
#Rotate the map 180 degrees:

montereybay %>%
 sphere_shade() %>%
 save_png(filename_map,rotate=180)