This line chart displays one week of temperature data for cities worldwide, sourced from Data Canvas - Sense Your City. The visualization uses d3.csv to load the data, d3.scaleTime and d3.scaleLinear for axes, and d3.line with curveBasis to render smooth, semi-transparent temperature trends per city. Colors are assigned via d3.scaleOrdinal with schemeCategory10, and a custom colorLegend module generates the interactive legend. d3.nest groups measurements by city, while axis labels and a title are added as SVG text elements.