D3 trials (fork of Cities on a Globe)

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D3 trials (fork of Cities on a Globe)

✓ Published0🌍 Public

Last edited Aug 4, 2021

Created on Aug 3, 2021

This interactive globe displays cities with populations over 100,000 as red circles, using an orthographic projection with drag-to-rotate and zoom capabilities. The visualization renders country boundaries from TopoJSON world-atlas data (110m resolution while dragging, 50m when stationary) and city locations from a CSV file, with circle sizes scaled by population. Tooltips show city names and populations via d3-tip. The implementation uses d3.geoOrthographic, d3.geoPath, d3.drag, and d3.zoom, filtering out cities on the hidden hemisphere based on their projected coordinates.

AI-generated description

A globe with pan & zoom showing circles for each city of over 100,000 inhabitants. Data from Geonames, preprocessed. The same data is used in World City Explorer.

Uses world-110m and world-50m geographic shapes from TOPOJSON World Atlas.

Inspired by

forked from <a href='http://bl.ocks.org/curran/'>curran</a>'s block: <a href='http://bl.ocks.org/curran/0bb64d8f56042e2480c908b0985f063b'>Orthographic Zoom III</a>

Imported to VizHub from bl.ocks.org: Cities on the Globe

MIT Licensed

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