Tautan baru untuk GHSL dan peta

Raster manipulation, 2016 

https://rstudio-pubs-static.s3.amazonaws.com/297476_0d048d71ed0245b4948906958dbc53ed.html

Raster mapping of Denpasar, 2018

https://rpubs.com/ricardo_ochoa/416712

And Duncan A Smith's blog

https://citygeographics.org/2016/12/14/world-population-density-interactive-map/

And R groundhog

https://groundhogr.com/

Robert Hijmans' raster package and rspatial.org