After dissolving inner boundaries, this sf shape [Pastebin] retains residual specks or crumbs:
library(sf) #download file "shp.txt" from Pastebin shp <- dget("shp.txt") class(shp)  "sfc_MULTIPOLYGON" "sfc" plot(shp)
I have tried 2 different methods of removing them but both fall short:
#CRS is in meters so that threshold parameters are expressed in square meters in both methods st_crs(shp)$units  "m" #Method #1 library(rmapshaper) shp <- ms_filter_islands(shp, min_area=1000000) plot(shp)
Method #1 fails to remove at least one tiny speck in the centre of the shape:
#Method #2 library(smoothr) shp <- drop_crumbs(shp, threshold=1000000) plot(shp)
Method #2 doesn't do anything, apparently.
What are substitute or complementary ways of accomplishing the task?