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

Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025
Olmo 3 is a fully open LLM - 22nd November 2025

geo 13 d3 12 observable 50 mike-bostock 6

Monthly 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!

Sponsor & subscribe