This interactive geographic visualization presents a world map and a separate map of Australia, allowing users to switch between the two views. The map supports multiple projections—including Natural Earth, Orthographic, Mercator, and Albers—and lets users toggle graticule grid lines. Clicking a country or Australian state displays a details panel with population, GDP, and continent information for world countries. The visualization is built with React and D3 v7, using `d3.geoPath` for rendering, TopoJSON data from the world-atlas package for the world map, and an external Australia states TopoJSON file, all drawn as SVG elements.