This choropleth map visualizes living cost index values across Indian states, with darker blue-green hues representing higher costs and gray indicating missing data. The visualization joins a hardcoded cost dataset to GeoJSON features using the ST_NM property, then applies a d3.geoMercator projection fitted to the SVG canvas. Interactive tooltips display state names and index values on hover via d3.event handlers, while a sequential color scale (d3.scaleSequential with d3.interpolateYlGnBu) and attached legend provide the visual encoding. The GeoJSON source is a remote GitHub repository for India state boundaries.