This example renders a choropleth map of Indian states, with each state filled by a categorical color and labeled with its name. It uses D3 v5’s `geoMercator` projection and `geoPath` to convert TopoJSON geometries into SVG paths, while `scaleOrdinal` and `schemeCategory10` assign colors. State boundaries are emphasized with white strokes, and hovering turns a state white. Data comes from a remote TopoJSON file, and the map is displayed within a fixed-width SVG on a teal gradient background.