A dot density map displays the locations of top tree species across the United States, with each circle colored by species type and jittered to reduce overlap. The visualization uses React with d3-geo’s `geoAlbersUsa` projection and `geoPath` to render state boundaries and data points as SVG circles. Data is loaded from a remote CSV via d3.csv, while US state topology comes from the us-atlas TopoJSON, processed with topojson’s `feature` and `mesh` functions. A legend maps species names to their corresponding colors.