Chalong satellite images 2017–2025: how it changed
8 yearly Sentinel-2 images of Chalong, Phuket, from 19 Feb 2017 to 1 Mar 2025. Green cover in true colour moved from 52% to 49% (-3 percentage points) across a 6 × 6 km box.
Before and after
20172025Drag the divider or use the arrow keys.
Year by year
19 Feb 2017 · cloud 28% · green 52% 
14 Feb 2018 · cloud 8% · green 57% 
25 Jan 2020 · cloud 0% · green 46% 
15 Feb 2021 · cloud 0% · green 54% 
15 Dec 2021 · cloud 10% · green 54% 
18 Feb 2023 · cloud 15% · green 47% 
15 Feb 2024 · cloud 2% · green 51% 1 Mar 2025 · cloud 9% · green 49%
Yearly facts
| Year | Acquired | Cloud cover | Green cover | Valid pixels |
|---|---|---|---|---|
| 2017 | 19 Feb 2017 | 28% | 52% | 100% |
| 2018 | 14 Feb 2018 | 8% | 57% | 100% |
| 2020 | 25 Jan 2020 | 0% | 46% | 100% |
| 2021 | 15 Feb 2021 | 0% | 54% | 100% |
| 2022 | 15 Dec 2021 | 10% | 54% | 100% |
| 2023 | 18 Feb 2023 | 15% | 47% | 100% |
| 2024 | 15 Feb 2024 | 2% | 51% | 98% |
| 2025 | 1 Mar 2025 | 9% | 49% | 99% |
Method and limits
- Sentinel-2 true colour at 10 m per pixel, so single houses are not visible.
- One clear dry-season acquisition per year; seasons and sun angle still differ slightly between years.
- Green cover is an RGB approximation of green-dominant pixels, not NDVI.
- Clouds, haze and shadows can remain in a scene even after selection.
Contains modified Copernicus Sentinel data, processed by MapScale.
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