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.
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.
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[ 2.4 ms ] story [ 32.7 ms ] threadOne would imagine that an article centered on this impressive claim, could display an actual image…
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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.
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.