This choropleth map visualizes agricultural productivity across the United States in 2004, with each state colored according to its productivity value. The visualization uses D3 v3's Albers USA projection to render the map and a quantized color scale ranging from light green (low values) to dark green (high values). States are colored by joining CSV data with GeoJSON features by state name; states without data appear gray. A simple legend is absent, but the color scale is defined by the minimum and maximum productivity values in the dataset.