This visualization maps public toilet density across Australian states using a choropleth of state polygons. It uses `d3.geoMercator` for projection, `d3.geoPath` for rendering, and a linear `d3.scaleLinear` color scale from white to blue to indicate toilet counts per state. Interactive features include `d3.zoom` for panning, tooltips on mouseover, and a click-to-zoom that rescales the view. The map data comes from a states GeoJSON, while toilet counts are derived from a CSV, and state-level sub-maps (suburbs) are fetched from a secondary GeoJSON source.