SATELLITE · SENTINEL-2 · WEEKLY · ONCHAIN

The forest, from orbit

Every week, Dryad pulls fresh Sentinel-2 imagery for nine vacant lots in Detroit, computes a vegetation index per parcel, and writes the result to a public ledger. This page is the live record.

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01 · This week

Latest cycle

Reading from local ledger...

02 · Trend

Per-parcel NDVI over time

Each line is one parcel. Higher NDVI = denser vegetation. The natural pattern is a spring greenup, peak in mid-summer, decline through fall, dormancy through winter. Anomalies (sudden drops > 0.15 in 7 days) are flagged automatically and emailed to the operator.

Cycles accumulate here over time. With one cycle on file you see a snapshot. With multiple cycles you see the seasonal pattern.
03 · The image

What the satellite saw most recently

Most recent NDVI heatmap of the Chadsey-Condon area
NDVI heatmap, ~2.6 km wide. Green = healthy vegetation, orange/red = built surfaces.
Closeup NDVI with the 9 parcels outlined
Closeup with the 9 parcels outlined. ~12 pixels per parcel at Sentinel-2 10 m/pixel.

For full methodology and the resolution tradeoffs vs Google Maps, see docs.html#satellite.

04 · Cycles

Recent cycles

Cycle Captured Cloud % Mean NDVI Anomalies Scene
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