This choropleth map visualizes the total homeless population per U.S. state in 2021, using a threshold-based color scale to highlight states with higher counts. The map is rendered as an SVG using `d3.geoPath` and the `geoAlbersUsa` projection, with data joined to GeoJSON features by state name. Hovering over a state displays a tooltip with the exact homeless population. The color mapping relies on `d3.scaleThreshold` and the `schemeBlues` color ramp, and the underlying data originates from the USDA’s county-level poverty estimates, adapted here to show homelessness figures.