This example displays a choropleth map of Indian states, with each state filled by a distinct color from a categorical scale and labeled with its name. It uses a Mercator projection configured through `d3.geoMercator` and renders geographic features via `d3.geoPath`. State boundaries and names come from a TopoJSON file loaded with `d3.json`, processed through `topojson.feature`, and drawn as SVG paths. The code assigns colors using `d3.scaleOrdinal` with `schemeCategory10`.