Uses sf::st_area function. If proj and LIM are NULL then no selection on limits are used ncut is used to eliminate area calculations with strokes less than the specified number.
library(geomapdata)data(worldmap)skam = SELGEOmap(worldmap, ncut=3, acut=c(10000,Inf), proj=NULL, LIM=NULL)par(mfrow=c(2,1))####### plot world map, with all lines:plotGEOmap(worldmap)length(worldmap$STROKES$num)###### same plot with some lines removed:plotGEOmap(skam)length(skam$STROKES$num)##########################################