This line chart visualizes temperature readings over time for San Francisco, using a dataset from Data Canvas. The chart employs a time-based x-axis and a linear y-axis for temperature, with grid lines extending across the plot area. The visualization renders multiple line paths, each representing a different city, using ordinal color scaling. Built with React and D3 v5, the SVG rendering leverages d3.scaleTime, d3.scaleLinear, d3.line, and d3.nest to group data by city, while the VizContainer handles margins and layout.