Mercator ↔ Equal Earth
Mirrored from Simon Willison for archival readability. Support the source by reading on the original site.
7th September 2026
Tool
Mercator ↔ Equal Earth
— View an interactive animated map that morphs between Mercator and Equal Earth projections using a slider or play button. The visualization demonstrates how different map projections represent the world, with controls to blend between the two projection types and observe how they preserve different geographic properties.
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.
Posted 7th September 2026 at 4:24 pm
Recent articles
- The Pelican comparison grid for Astra is pretty interesting - 4th September 2026
- OpenAI's rogue agents were caught communicating via public wikis - 4th September 2026
- Claude's new system prompt really doesn't want to reproduce song lyrics - 2nd September 2026
This is a beat by Simon Willison, posted on 7th September 2026.
geospatial d3 vibe-coding gpt-6-astraMonthly briefing
Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.
Pay me to send you less!
Discussion (0)
Sign in to join the discussion. Free account, 30 seconds — email code or GitHub.
Sign in →No comments yet. Sign in and be the first to say something.