datasets

Health, environment and transport datasets.

• CDC WONDER XML API: 15 seconds between requests, and errors come back as HTTP 500 · 2026-09-08
• GTFS stop_times.txt: arrival_time goes past 24:00:00 and strptime refuses it · 2026-09-08
• api.weather.gov gridpoints: validTime is an interval, values are Celsius, and units=us is rejected · 2026-09-08