This visualization renders a choropleth map of Indian states, colored by category using a D3 ordinal color scale. It loads TopoJSON data from a remote source and converts it to GeoJSON with the TopoJSON `feature` API. The map is projected using `geoMercator` and drawn as SVG paths via `d3.geoPath`. Each state is labeled with its name placed at the path’s centroid, and state boundaries are highlighted with a yellow stroke and semi-transparent opacity.