This choropleth map shows crime rate values for U.S. states, encoded with a threshold color scale ranging from light blue to dark navy. The map renders SVG paths via `d3.geoPath` with a `d3.geoAlbersUsa` projection, using TopoJSON data from the us-atlas repository. State values are loaded from a CSV file and mapped to fill colors, with a legend displaying the color bins alongside interactive tooltips on hover.