D3 + TopoJSON using the
world-atlas dataset for a world map and
the us-atlas dataset for a US map
example.
world-atlas@2/countries-110m.json
(TopoJSON). Projection:
d3.geoNaturalEarth1. Colored by
population (millions).
us-atlas@3/states-10m.json
(TopoJSON). Projection:
d3.geoAlbersUsa.