=>UPDATE: résolution améliorée à 20m !Voilà, après quelques jours de bidouille, j’ai réussi à produire la mosaïque de la France à partir: La mosaïque vous est présentée à 20m de résolution, elle occupe déjà 8GO. Il aurait été possible de la produire à 10m, mais il aurait fallu 32 GO et quelques dizaines d’heures de […]
Using the new L3A product in Theia it is possible to make nice cloud-free mosaics from Sentinel-2 imagery. Here is an example for Belgium and the script to do it in your terminal. Click here to view and pan in full screen. # download L3A images over Belgium python theia_download.py -l ‘Belgium’ -d 2018-07-01 […]
=> Heureusement que les biologistes animaliers ne sont pas censés passer sur ce blog, il pourriaent être choqués par ce qui suit. Bon, expliquons nous !
=> Thankfully, animal biologists are not supposed to read this blog, as they might be shocked by what follows : Well, let’s explain !
On June 23 we will celebrate the third anniversary of Sentinel-2A in orbit. With three years of data we can start looking at the inter-annual variability of biophysical variables, like.. (random example), the snow cover. This is what I attempted to do for the Theia workshop. I downloaded all available snow cover products from Theia over […]
The Global Imagery Browse Services is an API provided by the NASA to access its vast collection of Earth Observation products. It’s convenient to use the Worldview online data browser to get the right URL template. Just click on « Take a snapshot » and copy the URL. For example the following URL allows you to download […]
After 3 years of development, we are very happy to share the news of Sen2Agri system release. Sen2Agri system is a fully automatic production system to produce agriculture information from Sentinel-2 data, with a focus on food security applications. For this reason, the final user meeting was held in Rome at Food and Agriculture Organization […]
To compute a cloud free synthesis of surface reflectances every month, a good repetitivity of observations is necessary. The weighted average method we developed at CESBIO, and which will be part of ESA’s sen2agri system was coded by Cosmin Udroiu at CS Romania. It was meant to work with both Sentinel-2 sensors and an observation every […]
As MACCS was used to produce a large amount of images (all the images acquired over France), we were able to make some more validation tests, such as checking the surface reflectance stability. To do that, the region of Arles in Provence (France), tile 31TFJ, is a good site, with a lot of clear skies, […]