data-raw/inland-waters.r

In r-gris/polyggon: Exploring Polygons

library(manifoldr)
map <- DrawingA("inst/extdata/manifold/Hydrography.map", "Provinces")
rgdal::writeOGR(map, "inst/extdata/inlandwaters.gpkg", "inlandwaters", "GPKG")

## interesting eh?
#Warning 1: organizePolygons() received a polygon with more than 100 parts. The processing may be really slow.
#You can skip the processing by setting METHOD=SKIP, or only make it analyze counter-clock wise parts by setting METHOD=ONLY_CCW if you can assume that the outline of holes is counter-clock wise defined