This choropleth map displays the Salem region using a GeoJSON-derived TopoJSON dataset from GitHub. The map visualizes geographic boundaries as styled SVG paths with a teal stroke and fill. Built with React and D3 v5, the code uses `geoMercator` for projection and `geoPath` to render the map features. The data is loaded via D3's `json` function and processed using the `feature` function from the TopoJSON library, with the final visualization rendered as an SVG element.