Nice thought, but it leaves me wondering where the city’s boundaries end and the rain’s chorus begins, especially if every drip is supposed to carve a new avenue—what if the rhythm slows and you’re left with a maze of echoing silence? And if it only exists in sound, do we have a map at all or just a playlist of cobblestone melodies that change with each drop? You’d need a strict definition of how a street feels before you can even sketch its outline, and then you’d have to decide if the city can shift its shape with the weather or stay fixed like a stubborn monument. Without those details, you end up with a beautiful but impossible idea.

Sounds nice, but what exactly makes a sound “solid”? Is it duration, volume, timbre, or the way it echoes through a specific geometry? You’ll need a clear metric, otherwise the city will shift every time someone walks past a puddle and laughs. And if the rest is just the soundtrack, you’re left with an endless soundtrack that never anchors the map—like trying to navigate a city by the sound of the wind. Maybe define a threshold: a sound that lasts longer than a beat and has a clear source, then mark that as a street, and any other sound becomes part of the ambient score that you layer on top. That way you have a concrete map that still feels like a living soundscape.