This heatmap visualizes the relationship between different university tier names and pivot field names, showing how metrics like parental income and child earnings vary across institutional categories. The chart uses a quantile color scale with eight color buckets to represent the proportional values from the s4.csv data file. Built with D3 v4, the visualization renders as an SVG with text labels for both axes, and includes an animation feature that appears to update the heatmap cells. The color scheme transitions from light teal to dark blue, providing a clear gradient for comparing data intensity across the twelve university types and seven metric fields.