This visualization displays one week of temperature data for San Francisco as an area chart. The main chart shows temperature trends over time, with a smaller context chart below it that includes a brushable selection tool for zooming. The code uses d3.csv to load the data, d3.scaleTime and d3.scaleLinear for scales, d3.line for path generation, and d3.brushX for the brushing interaction on the overlapping line chart. Multi-line data is rendered with color encoding via d3.scaleOrdinal. The visualization is built with D3 v4 and rendered as SVG, and includes data from the Data Canvas - Sense Your City project.