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Surely you understand it's based on limited resolution data, and therefore intended to be used at the scale of general topography like mountains and valleys?

That it's not taking into account human construction or distances of tens of meters?

Presumably you can walk a little bit and climb on someone's roof to see the claimed 24.7 km. Assuming a sufficiently clear atmosphere, and that there isn't a tall office building in the way or something.

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Why not complain that there's a point inside somebody's basement and you can't see any distance from that? Why not complain that it's wrong any time you close your eyes? Those would be about as sensible.
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Ironically, the site would probably say you can see 20 km from inside the basement.
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What's ironic about that? Of course it would. It's working off of large-scale terrain features, not structures. It will also tell you that you can see distant mountains when it's cloudy or you don't have your glasses on.
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