Reusable spiral heatmap
A reusable spiral heatmap displays German car and truck production data from Makeover Monday, using a continuous spiral of colored arcs to encode monthly production values. The D3 v4 chart, rendered in SVG, maps each data point to an arc along the spiral, with arcsPerCoil set to 12 to align with months. Labels around the circumference identify months, while labels at the start of each coil mark years. The implementation exposes configurable options such as radius, hole radius proportion, arcs per coil, and coil padding, making it adaptable to other periodic datasets. Color encodes production volume, and the spiral layout reveals cyclical patterns over time.
AI-generated descriptionAn example of a resuable spiral heatmap.
The data is from the Makeover Monday series, about German car and truck production.
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forked from <a href='http://bl.ocks.org/tomshanley/'>tomshanley</a>'s block: <a href='http://bl.ocks.org/tomshanley/4080b28445785939b3f043b8c5b63e22'>Reusable spiral heatmap</a>