node-d3-contour - 1.3.2-4 main

squares to a rectangular array.
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Computes contour polygons by applying marching squares to a
rectangular array of numeric values.
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Contour polygons are GeoJSON, you can transform and display
them using standard tools.
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Contour plots can also visualize continuous functions by sampling.
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Contours can also show the estimated density of point clouds,
which is especially useful to avoid overplotting in large
datasets. This library implements fast two-dimensional kernel
density estimation.
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Node.js is an event-based server-side JavaScript engine.