The MapBox GeoData Library is a collection of free datasets that have been optimized to work well with TileMill and offer an excellent source for geographic data. For more details about the MapBox GeoData Library, see our technical reference.
For this guide, we’ll add a layer of populated places around the world.
#countriesstyled with some example CartoCSS code.
citiesin the ID field. You’ll use this ID to reference this layer.