This example displays a choropleth map of Mexico’s regions, rendered as SVG paths. Using D3’s `geoMercator` projection and `geoPath`, it draws country boundaries and graticules, with each region filled in red and outlined in yellow. The map is built with React, fetching TopoJSON data from a gist, converted via `topojson.feature`. The visualization omits data for missing regions, which are not plotted.