An earthquake with magnitude 6.7 occurred on 06 Sep 2018 in Hokkaido, Japan, killing at least 17 people and leaving nearly 3 million households in Hokkaido without electricity. The quake came two days after typhoon Jebi, « the strongest storm of 25 years« . Below is an image comparison near Atsuma dam lake in the south of Hokkaido, […]
=> UPDATE: resolution improved to 20m ! I had to tinker a couple of days with Theia’s Sentinel-2 monthly syntheses, in order to produce the mosaic below. For that, I used: This mosaic best resolution is 20m. It is already requiring 8 GB. We could have provided it at 10m resolution, but it would have […]
In the Landslide blog Dave Petley has analyzed Planet images of the Pashgor debris flow in Afghanistan (here and here). Here I used two Sentinel-2 images (before and after the event) to show the path of the debris flow from the high mountain area to the Panjshir Valley. Sentinel-2 images have a lower spatial resolution […]
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 […]
Almería province in Spain is « one of the most recognisable spots on the planet from the lens of a passing satellite. The roofs of tens of thousands of closely packed plastic greenhouses form a blanket of mirrored light beaming into space. » (The Guardian). Greenhouses in Almería are typically made with transparent plastic to increase the […]
=> Thankfully, animal biologists are not supposed to read this blog, as they might be shocked by what follows : Well, let’s explain !
=> Coming back from our stay in the Alps, we stayed one day near the Verdon Gorges, the European Grand Canyon (I know there is a difference in scale with the American one). Anyway, the landscape was gorgeous as you can seen on the panorama below. But don’t worry, I will not tell you […]
The departmental council of the Alpes de Haute-Provence has put online 6,500 km of hiking trails throughout its territory. These trails are visible on the site www.rando-alpes-haute-provence.fr which works with Geotrek software. To allow hikers to better prepare their outing, it might be useful to add the 20 m resolution snow maps produced by Theia […]
[This post was written by Simon Gascoin and Sylvain Ferrant] The Lao News Agency reported that the Xe-Pian Xe-Namnoy dam collapsed on Monday causing catastrophic flash floods. « The disaster has claimed several human lives [and] left hundreds of people missing, » the agency reported. Construction of the Xe-Pian Xe-Namnoy dam began in 2013. Commercial operations were […]