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Map Projections Using d3.js

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Maps

Problem: The earth is round, but our screens are flat.

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Maps

Problem: The earth is round, but our screens are flat.

Solution: Provide a systematic transformation between coordinates systems.� Ex: (lat, lon) ⇒ (x, y)

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Maps

Problem: The earth is round, but our screens are flat.

Solution: Provide a systematic transformation between coordinates systems.� Ex: (lat, lon) ⇒ (x, y)

...there isn’t just one correct answer! Numerous map projections provide� different solutions to this problem.

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Map Projections in d3.js

d3.geoStereographic

d3.geoConicConformal

d3.geoMercator

d3.geoEquirectangular