This smoothed radar chart compares two French railway stations across seven qualitative and quantitative criteria, including cleanliness, security, passenger information, waiting comfort, shops and restaurants, average distance traveled, and accessibility for people with reduced mobility. The chart renders two overlapping, semi-transparent polygons, one blue and one dark orange, using the D3.js library’s SVG and animation capabilities. Data is loaded from a CSV file via `d3.csv`, and each station’s scores are normalized to a ten-point scale before being passed to the custom `RadarChart` function, which uses `d3.scaleOrdinal` for color and `d3.scaleLinear` for radial scaling.