This example visualizes global agricultural productivity with a qualitative color scale, plotting wheat production against a pest control metric. Each circle represents a data point, with colors encoding the year (2015–2021) using an ordinal scale from d3.scaleOrdinal. The scatterplot uses d3.csv to load data and d3.axisBottom/axisLeft for axes, while a legend from d3.legendColor clarifies the year mapping. The SVG rendering applies linear scales for positioning and radius, though circle size remains fixed at 8 pixels despite the size scale being defined.