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Mercator ↔ Equal Earth

Tool: Mercator ↔ Equal Earth I got curious about the Equal Earth map projection that was recently voted on at the UN so I had GPT-6 Astra (medium) in ChatGPT Work build me this animated transition between Mercator and Equal Earth using D...

By OpenSmartRoute editorial · attributed excerpt

From Simon Willison

Tool: Mercator ↔ Equal Earth I got curious about the Equal Earth map projection that was recently voted on at the UN so I had GPT-6 Astra (medium) in ChatGPT Work build me this animated transition between Mercator and Equal Earth using D3. Tags: geospatial, d3, vibe-coding, gpt-6-astra

Read the original at Simon Willison: Mercator ↔ Equal Earth

Source: https://simonwillison.net/2026/Sep/7/equal-earth/

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Published Sep 7, 2026 · updated Sep 7, 2026 · 60 words

This post is an attributed excerpt of the source above (unusable model output); no model rewrote it. Refer to the source for the authoritative text.

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