This radial bar chart displays wind speed and direction data from a CSV file, with eight color-coded speed bins arranged around a compass. D3.js (v6) and the custom `d3-scale-radial.js` library convert linear scales to radial distances for the stacked bars. The chart uses `d3.stack()`, `d3.arc()`, and `d3.scaleBand()` to render the segments, with angular labels and concentric circular gridlines showing frequency values. A legend identifies the speed ranges, and the SVG output includes accessible text elements.