Notes

Build logs, HDB policy explainers and data findings from the dataset behind the map — 970k geocoded, CPI-deflated resale transactions since 1990.

Building flatlas.sg — a 35-year HDB price map, and the production bug that taught me to fail loud

build-log · 30 Jun 2026 · postgis · maplibre · go · docker · etl · devops · singapore · side-project

How a solo-built map of 970k geocoded HDB resale transactions works — PostGIS, Martin tiles, a Go API — and the deploy that broke production while every health check stayed green.