A circular wind rose chart visualizes directional wind speed data as stacked radial bars around a central point, with each bar segment colored by speed category and labeled around the perimeter. Built with D3 v5, the visualization uses `d3.arc()` for the radial segments, `d3.scaleBand()` for angular positioning, and `d3.stack()` to layer the speed components. The data originates from the Data Canvas - Sense Your City project. A legend and circular grid lines with radial axis ticks support interpretation of the magnitude and direction of the wind measurements.