TerraTrace turns 24 years of NASA Earth observations into answers any student can use. Find a place. Prove how it's changing. Cite it in your report.
The problem: NASA's Earth data is free, but most students can't use it: it needs coding, GIS software and statistics. So assignments end up citing blogs instead of evidence.
Our answer: click a place → get a trend that has been statistically tested (Mann–Kendall + Sen's slope, the methods climate scientists use), explained in plain language, ready to cite.
Ctrl K search · 1–9 variable · M trend/timeline · Space play · T story mode · H hotspots · A ask · Esc close
Every file in data/processed/ is checked against docs/DATA_CONTRACT.md when the page loads. Add ?mode=mock or ?mode=real to the URL to force a mode.