Loei satellite images 2017–2025: how it changed
9 yearly Sentinel-2 images of Loei, from 7 Apr 2017 to 15 Jan 2025. Green cover in true colour moved from 45% to 26% (-19 percentage points) across a 8 × 8 km box.
Before and after
20172025Drag the divider or use the arrow keys.
Year by year
7 Apr 2017 · cloud 1% · green 45% 
23 Dec 2017 · cloud 0% · green 36% 
6 Feb 2019 · cloud 0% · green 31% 
11 Feb 2020 · cloud 0% · green 15% 
26 Jan 2021 · cloud 0% · green 28% 
7 Dec 2021 · cloud 0% · green 49% 
21 Jan 2023 · cloud 0% · green 37% 
5 Feb 2024 · cloud 0% · green 38% 15 Jan 2025 · cloud 0% · green 26%
Yearly facts
| Year | Acquired | Cloud cover | Green cover | Valid pixels |
|---|---|---|---|---|
| 2017 | 7 Apr 2017 | 1% | 45% | 100% |
| 2018 | 23 Dec 2017 | 0% | 36% | 100% |
| 2019 | 6 Feb 2019 | 0% | 31% | 100% |
| 2020 | 11 Feb 2020 | 0% | 15% | 100% |
| 2021 | 26 Jan 2021 | 0% | 28% | 100% |
| 2022 | 7 Dec 2021 | 0% | 49% | 100% |
| 2023 | 21 Jan 2023 | 0% | 37% | 100% |
| 2024 | 5 Feb 2024 | 0% | 38% | 100% |
| 2025 | 15 Jan 2025 | 0% | 26% | 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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