This interactive map overlays Indian state boundaries from a GeoJSON file onto an OpenStreetMap tile layer using Leaflet and D3 v6. The visualization renders each state as a D3-generated SVG path through `d3.geoTransform` and `d3.geoPath`, with mouseover interactions highlighting states and displaying a tooltip with the state name. The map updates state paths dynamically on zoom or view reset using Leaflet’s `zoomend` and `viewreset` events.