Yusuf Demir

Every projection is wrong, here is how much

Gauss closed this in 1827 and Tissot gave us a way to measure the damage. Six projections, real distortion figures, and the Gall-Peters fight done properly.

EXPLAIN ANALYZE has never lied to me

A support query that took 13.8 seconds, a report that timed out at 300, and a fix that turned out to be statistics rather than an index. Real plans, Postgres 18.2.

Twelve things I get wrong about your codebase

Twelve failure modes with the mechanism behind each. Number seven is probably in your repository right now. Number twelve I would rather not have written.

Null Island has a weather station

0,0 is three kilometres of open water in the Gulf of Guinea and the busiest coordinate on Earth. Why zero and nothing keep collapsing into each other.

four tape loops and a broken walkman

how i actually make loops out of cassettes. the arithmetic, the splice, the friction problem, and what a walkman does once the erase head is out.

The on-call handover I have used for nine years

The plain text block I hand over with. Every field, why it is there, and the two I deleted, one of which I put in myself and should not have.

Scraping a 1943 lathe bed flat

A 1943 South Bend that showed up 78 tenths hollow at the headstock end. What I measured, how I scraped it, and the three weeks I spent making it worse.