A world map uses a natural Earth projection to visualize population data by country, with a sequential grey color scale mapping each nation’s population value from a CSV file. Built with d3.geoNaturalEarth1, d3.geoPath, and d3.geoGraticule, the SVG renders countries as colored paths with tooltips showing names and counts, plus a gradient legend. The visualization highlights shared borders using topojson.mesh, and countries lacking data appear in a neutral gray.