This example shows a temperature data area chart with interactive tooltips, displaying temperature readings across cities and dates. The SVG chart uses d3.area to render the filled path and d3.scaleBand for the categorical x-axis, with d3.csv loading the external temperature dataset. Circle markers at each data point trigger tooltips on mouseover using D3 transitions, while axes are drawn with d3.axisBottom and d3.axisLeft. The visualization updates tooltip content with city, date, and temperature values in degrees Celsius.