Chiang Mai satellite images 2017–2025: how it changed
9 yearly Sentinel-2 images of Chiang Mai, from 9 Feb 2017 to 2 Feb 2025. Green cover in true colour moved from 33% to 27% (-6 percentage points) across a 10 × 10 km box.
Before and after
20172025Drag the divider or use the arrow keys.
Year by year
9 Feb 2017 · cloud 0% · green 33% 
6 Mar 2018 · cloud 0% · green 17% 
30 Apr 2019 · cloud 1% · green 29% 
26 Dec 2019 · cloud 0% · green 10% 
24 Jan 2021 · cloud 0% · green 29% 
8 Feb 2022 · cloud 0% · green 30% 
3 Feb 2023 · cloud 0% · green 29% 
14 Mar 2024 · cloud 0% · green 13% 2 Feb 2025 · cloud 0% · green 27%
Yearly facts
| Year | Acquired | Cloud cover | Green cover | Valid pixels |
|---|---|---|---|---|
| 2017 | 9 Feb 2017 | 0% | 33% | 100% |
| 2018 | 6 Mar 2018 | 0% | 17% | 100% |
| 2019 | 30 Apr 2019 | 1% | 29% | 100% |
| 2020 | 26 Dec 2019 | 0% | 10% | 100% |
| 2021 | 24 Jan 2021 | 0% | 29% | 100% |
| 2022 | 8 Feb 2022 | 0% | 30% | 100% |
| 2023 | 3 Feb 2023 | 0% | 29% | 100% |
| 2024 | 14 Mar 2024 | 0% | 13% | 100% |
| 2025 | 2 Feb 2025 | 0% | 27% | 100% |
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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