This example appeared in the R Graphics Cookbook, or at least that’s where I found it. It is here so that automated description of graphs by BrailleR can be demonstrated.

library(maps) # For map data
east_asia <- map_data("world", region = c("Japan", "China", "North Korea", "South Korea"))
ggplot(east_asia, aes(x = long, y = lat, group = group, fill = region)) +
  geom_polygon(colour = "black") +
  scale_fill_brewer(palette = "Set2")

Map of China, Japan and both North and South Korea

This is an untitled chart with no subtitle or caption.
It has x-axis 'long' with labels 70, 90, 110 and 130.
It has y-axis 'lat' with labels 20, 30, 40 and 50.
There is a legend indicating fill is used to show region, with 4 levels:
China shown as very light green fill, 
Japan shown as strong yellowish pink fill, 
North Korea shown as light purplish blue fill and 
South Korea shown as deep purplish pink fill.
The chart is a polygon graph that VI cannot process.
It has colour set to black.

N.B. The coast lines and country borders are plotted using polygons with numerous sides. BrailleR cannot process this huge number of line segments.

Download Example4.Rmd