Coway Map

Overview

Singapore’s equatorial climate brings near-daily downpours, so the city is laced with government-built covered linkways, overhead bridges, underpasses, and MRT concourses. Regular maps only show the quickest path; locals instinctively take the route that keeps them dry. Coway Map turns that instinct into an algorithm — treating shelter exposure as a routing cost and combining it with live rainfall data.

How it works

• A* routing over a PostGIS walking graph, with shelter exposure priced into every segment alongside distance.
• Three modes — Fastest, Balanced, and Sheltered — trade walking time against staying covered.
• Coverage data built from OpenStreetMap, official shelter polygons, and live rainfall zones from data.gov.sg.
• Community surveys continuously verify which paths are truly covered, improving accuracy over time.

One backend, three clients