There's many more beaver dams visible in the area:
The water is running towards the north, so the dams are roughly horizontal, with a brownish swamp underneath.
Re:World's largest beaver dam shows up on satellite images
by rualca on Saturday May 01, 2021 @12:00PM
(#27007321)
Spatial resolutions higher than 50cm has been a thing for civilian earth observation companies for a couple of decades. There are civilian companies who even provide products with a 25 cm spatial resolution for about a decade now.
In fact, currently there is a significant research focus on coregistering products from UAVs and satellite in good part because the differences in spatial resolutions from cheap low-flying drones and satellite imagery haven't been that different, so it's now possible to get reliable feature matches.
One would imagine that an article centered on this impressive claim, could display an actual image…
https://assets.atlasobscura.com/media/W1siZiIsInVwbG9hZHMvcG...
There's many more beaver dams visible in the area: The water is running towards the north, so the dams are roughly horizontal, with a brownish swamp underneath.
In fact, currently there is a significant research focus on coregistering products from UAVs and satellite in good part because the differences in spatial resolutions from cheap low-flying drones and satellite imagery haven't been that different, so it's now possible to get reliable feature matches.