A world map uses semicircular bubbles to show the total number of dead and missing migrants by location, based on a subset of the Missing Migrants Global dataset. The visualization renders land, interiors, graticules, and a sphere using `d3.geoNaturalEarth1` and `d3.geoPath`, while bubble sizes are scaled with `d3.scaleSqrt`. React components manage the map and data loading, with CSV parsing via `d3.csv` and TopoJSON world atlas features via `topojson.feature`.