Urban geophysics ups the ante in the world of applied geophysics, if for no other reason than the settings. The objectives and associated challenges are the same as other applications: to characterize, image, delineate, detect, resolve, etc. But it is the arena that makes the job of the urban geophysicist not one for the timid. It is a job that requires innovative thinking and seemingly off-the-wall approaches. Geophysical warriors who take on these daunting missions are cut from a unique cloth, the Team 6 of the applied geophysical community. Well, maybe that is a bit over the top, but as you will see in this special section, meeting the data challenges of urban settings and dealing with associated human sprawl requires problem-solving that clearly steps well beyond anything they tried to teach us in school.

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