This multiline chart displays one week of temperature data in degrees Celsius for cities worldwide, sourced from Data Canvas - Sense Your City. The visualization uses D3 v5 with nested line paths to plot temperature over time, with each city assigned a distinct color from the ordinal color scale. The code employs d3.line with curveBasis for smooth curves, d3.nest to group data by city, and custom axis labels and legends rendered as SVG elements.