This year, the #LondonMarathon would have been held under clear blue skies. Satellite images show us iconic spots along the route abandoned under #lockdown.
This thread compares Sunday's cloud-free image with 22 April 2018; the last time the race ran under clear skies [1/5] 🛰️🏃
The Sentinel-2 satellite @CopernicusEU passes overhead around midday, shortly after the elite runners will have finished 🛰️🏃 Here we can see the Mall in 2018, bustling with media tents, red banners, a mass of people after the finishing line, and a busy Thames [2/5]
At the time of the 🛰️overpass, many runners will have been crossing Tower Bridge at ~12 miles. Even with this high-resolution imagery (each pixel is 10 m across), it's not possible to make out individual people. Compared with 2018, you can see the clearer streets yesterday [3/5]
And here are some close-ups of the finishing line on the Mall next to Buckingham Palace, and the Tower of London, where you can clearly see the difference between empty streets yesterday and those filled with runners in 2018. [4/5]
This thread was inspired by @Sentinel_hub's COVID-19 Custom Script Contest @EuroDataCube. I didn't develop a script, but it did get me thinking about how you might be able to see the impact of COVID-19 from space. If you're interested in the contest: https://www.sentinel-hub.com/contest 
You can follow @DrTELS.
Tip: mention @twtextapp on a Twitter thread with the keyword “unroll” to get a link to it.

Latest Threads Unrolled: