This world map visualization displays global migration data for the year 2019, with each country’s migrant population represented by a white circle whose radius is scaled to the data value. The map uses a Natural Earth projection with graticules, country boundaries, and interior mesh lines. The visualization is built with React, D3 v5, and the topojson library, rendering SVG paths for the geographic features and circles for the data points. The geographic data comes from the world-atlas GeoJSON dataset, while migration figures are loaded from a CSV file.