Simon Willison’s Weblog

D3 Projection Comparison (via) Fun Observable notebook that lets you compare any two out of D3’s 96 (!) geographical projections of the world.

Posted 10th March 2019 at 10:58 pm

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

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