Choropleth map

Choropleth map

A choropleth map visualizes global income groups using a divergent spectral color scale, with country names and income categories shown on hover. The map uses a natural Earth projection via `d3.geoPath` and supports zooming and panning through `d3.zoom`. World geometry comes from TopoJSON (50m), enriched with TSV metadata, while `d3.scaleOrdinal` drives the color mapping. A legend, built with a reusable colorLegend module, displays the categorical scale; hover effects highlight countries in red.

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Choropleth map with D3.js!

This choropleth map visualizes world countries colored by income group using D3.js. The map uses a natural Earth projection via `d3.geoPath` and `geoNaturalEarth1`, with country boundaries loaded from TopoJSON world-atlas data and income classifications joined from a TSV file. A color legend built with `scaleOrdinal` and `schemeSpectral` displays the categorical color scale. Interactive zooming is implemented through `d3.zoom`, and hovering over a country highlights it in red while a tooltip reveals its name and income group.

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Choropleth Map

A choropleth map colors countries by their income group using a categorical ordinal color scale, with hover effects highlighting individual nations. Built with D3 v5, it renders geographic boundaries as SVG paths via `d3.geoPath` and `geoNaturalEarth1`, and loads world geometry from the world-atlas TopoJSON dataset. A custom color legend displays the categories, while zooming is enabled through `d3.zoom`. Data is processed asynchronously with Promises, merging TSV metadata with TopoJSON features.

Choropleth Map

A choropleth map colors countries by their income group using a categorical ordinal color scale, with hover effects highlighting individual nations. Built with D3 v5, it renders geographic boundaries as SVG paths via `d3.geoPath` and `geoNaturalEarth1`, and loads world geometry from the world-atlas TopoJSON dataset. A custom color legend displays the categories, while zooming is enabled through `d3.zoom`. Data is processed asynchronously with Promises, merging TSV metadata with TopoJSON features.

Choropleth Map

A choropleth map colors countries by their income group using a categorical ordinal color scale, with hover effects highlighting individual nations. Built with D3 v5, it renders geographic boundaries as SVG paths via `d3.geoPath` and `geoNaturalEarth1`, and loads world geometry from the world-atlas TopoJSON dataset. A custom color legend displays the categories, while zooming is enabled through `d3.zoom`. Data is processed asynchronously with Promises, merging TSV metadata with TopoJSON features.

Choropleth Map

A choropleth map colors countries by their income group using a categorical ordinal color scale, with hover effects highlighting individual nations. Built with D3 v5, it renders geographic boundaries as SVG paths via `d3.geoPath` and `geoNaturalEarth1`, and loads world geometry from the world-atlas TopoJSON dataset. A custom color legend displays the categories, while zooming is enabled through `d3.zoom`. Data is processed asynchronously with Promises, merging TSV metadata with TopoJSON features.

Choropleth map

This example displays a choropleth map of the world, coloring each country according to its income group using a categorical color scale. The visualization loads geographic data from the World Atlas TopoJSON and TSV files, projecting it with `d3.geoNaturalEarth1` and rendering paths via `d3.geoPath`. A custom legend component uses D3 selections to show color categories. The map supports zoom and pan through `d3.zoom`, and hovering over a country highlights it in red while a tooltip reveals its name and income group.

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