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Points on a Map

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Points on a Map

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Zzyniax
Last edited Apr 13, 2021
Created on Apr 13, 2021
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This visualization displays a world map with circles marking cities whose population exceeds 50,000, using the Natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath`. The map includes graticules and country boundaries from World Atlas TopoJSON, with city data sourced from Simplemaps. Circle radii are scaled by population using `scaleSqrt`, rendered as semi-transparent SVG elements in React. The implementation leverages React hooks for data loading and D3 v5 for geographic projections and CSV parsing.

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.