Fork of Sized Points on a Map

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Fork of Sized Points on a Map

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Last edited Jan 30, 2021

Created on Jan 30, 2021

A world map displays cities with populations over 50,000 as semi-transparent circles, sized proportionally to population using a square-root scale. The visualization uses React for component structure, with d3-geo’s `geoNaturalEarth1` projection and `geoPath` to render landmasses, graticules, and country boundaries from World Atlas TopoJSON. City coordinates and populations come from Simplemaps’ World Cities Database, loaded via d3.csv. The SVG rendering iterates over city data, projecting longitude and latitude to screen positions and setting circle radii through the `scaleSqrt` domain and range.

AI-generated description

A world map showing cities with population greater than 50,000. City data from Simplemaps: World Cities Database.

Country boundaries from World Atlas TopoJSON, polished for visual style, including graticules.

MIT Licensed

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