Circles on a Map

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Circles on a Map

✓ Published1🌍 Public

Last edited Mar 26, 2020

Created on Mar 26, 2020

Circles on a Map visualizes COVID-19 confirmed cases by country as proportional circles overlaid on a natural Earth projection. Circle area encodes case counts via a square-root scale, and hovering highlights country boundaries with a tooltip showing the country name and case total. The visualization supports pan and zoom interactions. Built with D3 v5, it uses `d3.geoPath` with TopoJSON world data, `d3.geoCentroid` for circle placement, and a zoom behavior applied to an SVG group. Population data from the UN and case data from a CSV drive the marks.

AI-generated description

Visualizing population by country using circles on a map! The area of each circle corresponds to the population of the country it represents. You can also pan & zoom, and hover over each country for more information.

MIT Licensed

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