https://flatlas.sg/blogBuild logs, HDB policy explainers and data findings from the flatlas price map.en-sghttps://flatlas.sg/blog/building-flatlashttps://flatlas.sg/blog/building-flatlasTue, 30 Jun 2026 08:00:00 +0000How 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.