Regional Forest Obervatories



Sentinel2 cloud-free composite: October 2015 - October 2017
Click the map to browse the Sentinel2 composite
Mato Grosso State (Brazil)
Kilimanjaro (Kenya)
Phnom Penh City (Cambodia)

A Sentinel-2 cloud-free composite over the tropical belt has been produced by processing all Sentinel 2A and 2B imagery available from October 2015 to October 2017. The spectral value of each pixel of the 2-years composite is calculated as the 'median' value of all Sentinel-2 data (imagery available for each respective pixel) after cloud masking using:

with additional test on
A RGB false color composite is created by using TOA-Reflectance of S-2 Bands B11, B08, and B04 (displayed as RGB) a spatial resolution of 20 m (Bands at 10 m are resampled to 20 m) and conversion to Byte using a scale factor of 0.051 for optimal visualization.

Prototyping and processing has been done in Google Earth Engine.

The Sentinel-2 cloud-free pan tropical mosaic is accessible via:

Download of the S2 mosaic in GeoTiff format will bee soon available.

Example of WMS integration are provided at following links:

Technical References

[1] Simonetti D., Simonetti E., Szantoi Z., Lupi A., and Eva H. D., 2015
First results from the phenology-based synthesis classifier using Landsat 8 imagery
IEEE Geoscience and remote sensing letters
[2] Simonetti D., Marelli A., Rodriguez D., Veselin V., Strobl P., Burger A., Soille P., Achard F., Eva H., Stibig H.J., Beuchle R., 2017
Sentinel-2 web platform for REDD+ monitoring,online web platform for browsing and processing Sentinel-2 data for forest cover monitoring over the Tropics.
Luxembourg: Publications Office of the European Union, EUR28658; doi:10.2760/790249
[3] Simonetti D., Marelli A., Eva H.D., 2015
IMPACT: Portable GIS toolbox image processing and land cover mapping
Luxembourg: Publications Office of the European Union, EUR 27358 EN, ISBN 978-92-79-50115-9