Contour Plot III
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Mmbostock
Last edited Mar 6, 2019
Created on Apr 7, 2017
A contour plot displays animated isolines of a mathematical function, with colors shifting through a red-blue diverging scale as the threshold values change over time. The visualization computes a grid of sine-based values, then uses d3-contour to generate contour geometries at varying thresholds. d3.geoPath draws these shapes onto a Canvas element, while d3.scaleSequential and d3.interpolateRdBu map contour values to colors. A d3.timer drives the animation, continuously updating the thresholds to create the moving contour bands.
AI-generated descriptionAn example of d3-contour.
gpl-3.0 Licensed