This example displays a map of Australia with its electoral regions, each filled with a distinct color from a categorical palette using `d3.scaleOrdinal` and `schemeCategory10`. The map is rendered as SVG paths generated by `d3.geoPath` with a `geoMercator` projection, using TopoJSON data from `australia.json`. State and territory names are overlaid at each region’s centroid via `pathGenerator.centroid`. The visualization relies on D3 v5 and the `topojson` library for feature extraction.