This choropleth map displays U.S. state population estimates for 2020, with each state filled by a color from a five-step quantized scale. The visualization uses d3-geo with an Albers USA projection and d3.geoPath to render the states from a GeoJSON file, while population data is loaded from a CSV. A d3.legendColor legend, styled with ColorBrewer palettes, communicates the population ranges. Missing values render in light gray, and the SVG output includes a title for the legend.