Multipolygon tricontourTricontour labelsTricontoursHexagotriangulationSpherical contoursManhattan Voronoi IIGraph VoronoiH3 odditiesH3 hexagons & geoContoursTricontour iteratorVolcano TricontoursBlurry contoursSpherical contours iteratorSpherical contours as a gradientReusing a Tricontour triangulationModified Shepard’s method II (with geoContour)MapfillSpherical isobandsPlanar tricontours on geo data (bad!)Tricontour flowerUK TricontoursTricontour isobands
d3-hexbin & tricontours heatmap