This example visualizes a world map with city points using React and D3. The map displays missing migrant incidents, with circle sizes representing the “Total Dead and Missing” metric via a d3.scaleSqrt. The geoNaturalEarth1 projection renders country boundaries, graticules, and interiors using d3.geoPath, while topojson provides the world-atlas data. City coordinates are projected and plotted as circles, with data loaded from a CSV using d3.csv. The SVG-based rendering uses React components for the atlas and marks.