This example combines Leaflet and D3 to visualize hand-drawn lanes and postal-code polygon boundaries in the Worli area of Mumbai. The map displays OpenStreetMap tiles as a base layer, with green polygons representing pincode regions and orange lines representing named lanes. Hovering over a lane highlights it and updates a custom Leaflet control with the lane’s name. Permanent tooltips show office name, office type, and pincode for each polygon, using Leaflet’s `L.geoJson`, `bindTooltip`, and event-driven style overrides.