Fork of d3-voronoi-treemap usage

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Fork of d3-voronoi-treemap usage

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Last edited Aug 21, 2023

Created on Aug 21, 2023

A Voronoi treemap shows the global economy by GDP as of January 2017, with countries as cells sized by their economic weight and grouped by continent, each with a distinct color. The circular layout clips the treemap using a computed polygon, and hover effects highlight individual cells. The visualization is built with React, D3 v4, and the d3-voronoi-treemap plugin, which combines d3-weighted-voronoi and d3-voronoi-map to compute the layout. Data comes from a JSON file listing GDP values and country codes, and the SVG rendering includes labels, legends, and a title.

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Fork of d3-voronoi-treemap usage

This example uses the d3-voronoi-treemap plugin to display the global economy by GDP as of January 2017, with countries sized by their economic weight and grouped by continent. Each country appears as a polygonal cell within a circular treemap, colored by its continent’s assigned hue. The code loads hierarchical JSON data, computes a weighted Voronoi treemap layout with a custom clipping polygon, and renders the result as SVG paths and labels. Built with D3 v4, it also includes hover effects and a color legend.

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This visualization uses the `d3-voronoi-treemap` plugin to display global GDP shares by country and continent, based on data from a `globalEconomyByGDP.json` file. A clipped Voronoi treemap partitions a circular region into labeled cells sized by each economy’s relative weight, with continent grouping indicated by distinct colors. The rendering is built with `d3.hierarchy` and `d3.voronoiTreemap`, producing an SVG output where hovered cells are highlighted with a thick white stroke. The title and legends are drawn within the same SVG container.

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The visualization displays global economic output by GDP, showing a treemap that morphs between rectangular and Voronoï layouts. It uses D3.js v4 with the d3-voronoi-treemap plugin, which iteratively partitions space to create weighted Voronoï polygons. Animated transitions between the two layouts are powered by flubber's `fromRect` interpolation, applied via `transition.attrTween` on SVG paths. The data comes from a JSON file of country GDP weights grouped by continent, with each region assigned a distinct color.

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