A choropleth map of India displays state-level living cost indices, using a linked dataset and geographic features joined by the `ST_NM` property name key. The visualization encodes values through a `d3.scaleSequential` with the `d3.interpolateYlGnBu` color interpolator, while gray shades indicate missing data. Built with D3 v7, it renders as SVG using `d3.geoMercator` projection fitted to the viewport and `d3.geoPath` for drawing state boundaries. Interactive tooltips appear on mouseover, showing each state's index value.