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A7 - HeatMap

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Rronnieferrufino4908@gmail.com
Last edited Mar 19, 2025
Created on Mar 19, 2025

This heatmap visualizes the yearly count of delayed flights for four airports (IAD, DCA, SFO, LAX) from 2003 to 2016, with darker blue cells indicating higher delay totals. The visualization uses d3.csv to load the data, d3.scaleBand for the year and airport axes, and a d3.scaleSequential with d3.interpolateBlues for color encoding. A custom tooltip shows exact values on hover, and the d3.legend library adds a color legend. The SVG rendering includes axis labels and a title, with 2016 showing a dramatic drop in recorded delays across all airports.

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