86.0 hectares changed — water gone
Olympic Village, Saint-Denis, Paris · 48.928, 2.339
Before: 1 Apr 2019 – 30 Jun 2019 · After: 1 Apr 2023 – 30 Jun 2023
BEFORE 2019-06
AFTER 2023-06
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86.0 haarea changed
27areas flagged
906 haarea examined
2satellites used
What SCOPE found
Water disappeared — 54.1 ha1.1 km south-west · between 16 May 2019 and 25 May 2023 · 86% sure
Vegetation cleared — 4.4 ha1.1 km south-east · between 24 May 2019 and 25 May 2023 · 98% sure
Vegetation cleared — 3.0 ha0.8 km south · between 16 May 2019 and 25 May 2023 · 98% sure
Vegetation cleared — 2.4 ha1.2 km south-east · between 24 May 2019 and 25 May 2023 · 96% sure
New construction / earthworks — 2.0 ha1.3 km east · between 24 May 2019 and 25 May 2023 · 96% sure
…and 22 more area(s) in the full report.
How sure is this?
The strongest area (#1) has 86% confidence. It appears in 6 of 6 later clear images, so it is not a one-day artefact. Radar confirmed some of these areas; the others rest on optical and seasonal evidence. Compared with the same season in earlier years, this is clearly unusual. Confidence measures how strong the evidence for real surface change is; it does not identify the cause or who did it.
How it was measured
SCOPE used Sentinel-2 optical imagery at 10 m, cloud-masked and combined over each period; Sentinel-1 radar, which sees through cloud, as an independent check; the same season in 2019, 2018, so normal seasonal change is not reported as real change. The whole analysis took 14 seconds.
What changed at your place?
Type any location on Earth. SCOPE compares satellite imagery from two periods and
explains what changed, roughly when, and how confident it is.
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